Propagation of Sound

[@ManochaAcademy]

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[@mohitroy1835]

Indeed

[@tannnn938]

10:43 1. High pressure region - COMPRESSION Low pressure - Rarefraction 2. Radio waves 3. Because in solids particles are closed to each other as compare as liquid and gas and sound travel faster in liquid than air because particles in liquid are much closer than gases . Thanks 😊

[@giaiaiaia]

1) Region of high pressure is known as compression and the region of low pressure is known as rarefaction 2) Electromagnetic waves do not need a medium to travel and so, will be the same if used in vaccuum 3) This is because the molecules in solids are closer together than in liquids and molecules in liquids are closer together than in gases. amazing explanation, thank you so much!!!

[@michaeladegbenro3075]

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[@sanbangtanarmy7167]

1. High pressure - Compression Low pressure- Rarefaction 2. Electromagnetic waves(wave of light) 3. I don't know the exact answer but I think sound travel faster in solid because the particles of solid is close to each other as compared to liquid and gases

[@buddhanda]

Yes to my opinion these answers are right

[@YoruShika-vh3md]

1. Compression and rarefaction 2. Light wave (since it can travel through vacuum no air ) 3. sound travel much faster in solid because the particles in solid are compacted together leaving no gap which able the sound wave or vibration to travel quickly. Sound travel faster in liquid as well because liquid particle has a slight gap between particles and sound wave travel quick when liquid particles are close to each other. While in gas it is slower that liquid and solid , because gas has wider and chaotic gap or movement so therefore sound wave can only travel in few gas particles unless the temperature is warm.

[@namanbelwalsreviews2581]

ANSWERS: 1:Region of high pressure is the region of high compression of the sound waves in air & the region of low pressure is the region of low compression of the sound wave in air. 2: Electromagnetic waves do not need any medium to travel like light. 3:In solids the particles are tightly packed so the sound waves can travel faster than a liquid and in a liquid the particles are loosely packed but not as loose as air so the sound waves travel more fast in liquid than in gases. BY THE WAY SIR YOU ARE SUPER AMAZING AND I HAVE NO WORDS TO TELL YOU ABOUT YOUR WORK FOR THIS VIDEO THANKS A LOT AND NEVER STOP BRINGING SUCH VIDEOS. REGARDS : ------ NAMAN BELWAL -------

[@prasanna8171]

Thanks da naman I'm shakela

[@anujkumar-yb4rz]

Q.1) High Pressure is Compression and Low pressure is Rarefaction Q.2) non -mechanical waves Q.3) molecules in solids are tightly packed so it easy for them to propogate , therefore it is faster . Session was really amazing , loved ur teaching ❤️

[@rithizx]

1) High Pressure: Compression Low pressure : Rarefaction 2) Non- Mechanical wave 3) Because solids have High density compare to liquid compared to gas ,therefore if the density is high the compression and rarefaction is more , hence speed of sound in solid> liquid> gas ❤

[@subhashteke4110]

1: compression and rarefaction 2 :electromagnetic waves 3 : because the particles in solid are tight so they can transfer energy Thankyou for such a nice explanation

[@geetakarkera1812]

Good

[@Batman-Avanish]

A fun as well as a great video, as you explain really good. Sir, the answers are: Q1. A region of high pressure in a sound wave is a compression while a region of low pressure is a rarefaction. Q2. An electromagnetic wave (Magnets work in a vacuum) Q3. Because Solids have lesser intermolecular space than the other two states of matter, and so the sound waves can travel much faster. Thank you!

[@idontgiveasht]

Thanks that was helpful

[@doyouknow6357]

1) In a sound wave , the region of high pressure is called compression and the region of low pressure is called Rarefaction .2) Electromagnetic wave does not require any material median for their propagation . 3) Sound travel in solid is more faster than liquid and gas because in solid particles are more closely pack to each other as compare to liquid and gas and in liquid particles are not much far away as compare to gas , so thats why sound travel in liquid is faster than gas .

[@sureshkait5514]

THANKS

[@ShubhamJha-tn5qf]

B

[@iqbalpara8322]

Sir you are brilliant

[@sundarir5996]

Q1.high pressure region-compression,low pressure region- rarefraction. Q2.electromagnetic wave. Q3.solid particles are packed very closely to each other as compared to liquid and gas ,liquid particles are closely packed than air particle .hence in solid the vibration passes very faster than the other two medium.

[@sundarir5996]

Lastly, the liquid particle passes somewhat faster than the solid as compared to gas .so liquid is faster than gas ....S>L>G

[@SKIZZYDANIEL-up1lf]

1. Compression and rarefaction 2. Electromagnetic wave 3. It's because in solid the particles are closer and fixed which vibrate around a fixed point why in liquid and gas thier molecule force are weak

[@mastifunn2012]

1.compression and rarefaction 2. Electromagnetic waves ( light wave) 3. As sound requires a medium and it propagates in medium having compAct atom ie close to each other

[@garistaeducationalchanel92]

Nice

[@garistaeducationalchanel92]

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[@garistaeducationalchanel92]

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[@poulomilayek8890]

You explained it very well. Earlier I had gone through your lecture on concave and convex mirror . I was mesmerized. This time also , you have fulfilled my expectations. While I teach my daughter I look forward for your lecture. Keep it up. Manas Layek, Associate professor

[@ManochaAcademy]

You're most welcome

[@snegaganesan1997]

1. Compression, Rarefaction 2. Electromagnetic wave. Because light travel as electromagnetic wave. Electromagnetic wave can even travel in vaccum. 3. In solid molecules are close enough. In liquid, it's not close enough as solid. In gas, they are far away than solid and liquid.

[@blood_2863]

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[@dashtheo5741]

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[@aishanisworld7837]

Answers to the top 3 questions 10:45 1) Compression and rarefaction 2)Light wave 3)Because in solids the molecules are closer qnd hence they vibrate faster than any other medium .

[@BizzBooms]

1 - a - Compression b - Refraction 2 - Electromagnetic Waves 3 - Sound waves are just disturbed air particles. Sound waves travel faster in solids than in liquids and in air because the particles are tightly packed (closest in comparison to other types of particles resulting in sound particles to easily jump and travel between solids) If we compare it to liquids and gases, liquids have a medium distance between each of its particles and gases have the furthest distance between each of its particles. This distance makes it proceedingly difficult for sound waves to travel.

[@77velvel]

Very good explanation

[@shakrullahfatihahayobami8810]

1.) The region of high pressure is called compression while the region of low pressure is called rarefaction 2.) The type of wave that doesn't require material medium is called electromagnetic wave 3.) wave travels faster in solids because the particles are closely packed together,for liquids they are slightly farther apart while the gas particles are farther apart

[@rebel9977]

after watching ur videos sir..i m in love wd physics..never saw such style of teaching ..thanku sir

[@ManochaAcademy]

It's my pleasure

[@rushikeshn5966]

1) high pressure =compression Low pressure = rarefaction 2)light wave 3)yes because We known that molecules are tightly packed in solids So they vibrate faster But in liquids and gases ,molecules are packed lossy. So they vibrate slowly So we can hear fast in solids then liquids and gases

[@Saimadance9]

No doubts, teaching practically is ☺☺☺v. Good

[@bhaskardebnath324]

1. Compression and rarefaction respectively 2. light wave 3. In solids and liquids, the molecules of the matter are much closer than in air, which is a gas, so the sound doesn't travel much fast in air but faster in liquids and more faster in solids

[@dragonemperor3844]

😊

[@gospelvibes374]

Correct 😊

[@madhusmita521]

Correct 👍

[@จินดารัตน์ช่างหล่อ-ต3ษ]

Q.1 : High Pressure - Compression : Low Pressure - Rarefaction Q.2 : Electromagnetic wave. Q.3 : Different molecular densities : solid > liquid > gas Thank you very much.

[@saritpornv9913]

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[@RevathiRamamoorthy-v5g]

This chanel and dont memeorise chanel is so far the best at teaching physics . I can understand this better than my teachrs lectures.😅😂😂

[@ManochaAcademy]

Wow, thanks

[@simplyfar2640]

1) high pressure - compressive, low pressure - rarefaction 2) electromagnetic waves 3. solids have molecules very close to each other, than gas or liquid and in liquid too the molecules are tight-packed compared to gas

[@AnjaliSingh-ti8pe]

1.Compression and rarefaction respectively 2.Radiowave 3. Because molecules in the solid are very close to each other than liquid and molecules in liquid are more close to each other than gases

[@its_Jae_here]

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[@ManochaAcademy]

Happy to help.

[@narayankalegaokr6853]

1) High pressure region - compression Low pressure region - Rarefaction 2) Electromagnetic wave 3)In solids the arrangement of molecules is that they are very closely packed wheresa the arrangement of molecules in liquids is that they are a little lose and in gases the arrangement of of molecules is that they are very far from each other that is the reason why the sound travels fast in solids as compared to liquids and gases

[@mdsaifalikhan7713]

1 high pressure compression low pressure rarefaction 2 non mechanical wave 3 because in solid particles are closely packed as liquid

[@rucharajan9019]

1. In a sound wave the region of higher pressure and lower pressure are known as compressions and rarefraction. One compression and rarefaction come together to form a wave. Higher pressure refers to compressions and lower pressure refers to rarefaction. 2. Waves which do not need a medium for their propagation are known as electromagnetic waves. An example of an electromagnetic wave is light which can travel through a vacuum. Waves which do need a medium for their propagation are known as mechanical waves. Mechanical waves are categorised into transverse waves and longitudinal waves. Transverse waves are the waves in which particles vibrate perpendicular to their medium of propagation. Longitudinal waves are the waves in which particles vibrate parallel to their medium of propagation. 3. sound travels fastest in solids, then liquids, then gases. The particles of a solid are closely connected and when sound is produced in it then vibration can travel from one particle to another very quickly and efficiently since they are all so closely packed compared to vibrations travelling in liquid. In liquid particles are not very closely packed so sound cannot travel as efficiently and quickly as in solids as the vibrating particle needs to travel in search of another particle to transfer the vibration. Similar is the case between liquids and gases, liquids have particles more closely spaced together as compared to gases and thus can transfer vibrations quicker than gases.

[@marwanmk2253]

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[@arvindbatish6900]

The ... Medium...on .... OUR... Planet ...Earth.... through.... which....these....Sound...Waves..... .....Thavel.. .......Is......... Ether.....😇🙏

[@bsavyanavar]

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[@madhushalinitunti6614]

1)High pressure -compression,low pressure-rarefaction 2) electromagnetic waves 3)Because of distance between (less is the distance ,more is the sound movement)molecules

[@benghazygh1613]

Q1. i. Compression ii. rarefractions Q2. Light energy Q3. a.This is because in solids, particles are closely packed to each other that which enables movement of sound wave faster and easier than compared to the other medium, liquid and gas b. That of sound in liquid particles travels faster than that in gases because the particles of gases are more widely close to each other that that of liquid.

[@vaishaliandhale1345]

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[@ManochaAcademy]

Most welcome

[@Rakshith-yw2gg]

Q1 High Pressure- Compression Low Pressure- Rarefaction Q2 Electromagnetic Waves Q3 The sound travels faster in solids compared to liquids as the molecules in solids are closer so the sound travels faster . Compared to gas the sound in liquids travel faster as the molecules are farthest in Gas Please reply if this is correct

[@sangeetajoshi2730]

1)High pressure compression Low pressure rarefaction 2) radio waves( electromagnetic) 3) The molecules of solid are closely packed and therefore can tranfer the vibrations (sound energy) faster.

[@mubashirkabeer4126]

Ans 1) The region of high pressure is known as compression and the region of low pressure is known as rarefaction Ans 2) Light wave does not need a material to travel Ans 3) Sound travels faster in solids as compared to liquids because the molecules in solids are densely packed and molecules in liquids are loosely packed(as compared to solids) And sound travels faster in liquids as compared to gases because the molecules in liquids are densely packed(as compared to gases) and molecules in gases are loosely packed(as compared to liquids). Sound travels faster by striking all the particles or the molecules which are more closer to it.

[@Hsriv]

1Q) Compression and Rarefaction 2Q) Electromagnetic Waves 3Q) Sound travels through producing vibrations by colliding into the particles. So in Solids, particles are tightly packed and sound can travel easily by vibrating. In Liquids, molecules are somewhat loosely packed so it can propagate medium-high speeds. But in Gases though,they are very loosely packed so propagating through them is not a peice of cake. Srivatsa VII - C

[@reginageorge2750]

Answer 1. These regions are known as compressions and rarefactions respectively. The compressions are regions of high air pressure while the rarefactions are regions of low air pressure. Answer 2. Electromagnetic waves. Answer 3. Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster. Sound travels most slowly through gases because the molecules of a gas are farthest apart. Thank you so much for this great explanation!

[@UMERKHAN-uo5mo]

Q1 high: compression Low: rarefaction Q2: electromagnetic waves such as heat waves🔥🔥🔥 Q3: because the particles of solid are closely packed

[@Nishanth_Gaming08]

1,High pressure compression low pressure rarefaction 2.Radio wave 3 because particles are held close to each other in solids so sound travels more faster whereas liquids have moderate force of attraction and gases have least Nice video Keep it up

[@apparao61]

Q1:1.compression 2:rare fraction Q2:Light does need a material to travel Ex;in the space there is no air present there but the light travels from the sun to earth Q3:1.the partcles are closer in the solids than liquids. 2.the particles are closer in liquids than in gases

[@rreditx4728]

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[@ManochaAcademy]

Thanks

[@Sakib.Shahriar]

Ans to 1: High is compression and low is rarefaction. Ans to 2: Electromagnetic Waves do not need medium to propagate. Ans. to 3: Solids are significantly denser tha liquids or gases. This means that the molecules are closer to each other in solids than in liquids and in liquids than in gases. This closeness due to density means that they can collide very quickly. ... Due to this advantage, the speed of sound in a solid is larger than in liquid & gas. Please reply me whether they are correct or not.

[@loiseshiimi3204]

Yho, I don't get when you... how are solids denser than liquid and gas???? If this is so than why does ice float on water???????

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[@Haiderali-xq2zn]

QNO1: comparisons and rarefaction QNO2: electromagnetics waves QNO3 : Sound travels faster in solids than in liquids, and faster in liquids than in gases. This is because the density of solids is higher than that of liquids which means that the particles are closer together. Sound can be transmitted more easily. sir please reply sir because sir these question are right or wrong please sir tell me

[@zazislamicchannel7565]

These answers are Wright

[@Haiderali-xq2zn]

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[@Aa-ep1ml]

Q1 Compression and rarfaction. Q2 Electromagnetic waves. Q3 Because particles of solids are much closer to each other as compared to the particles of liquids and hence particles of solid pushes each other more rapidly in order to propagate the sound energy than liquids. Similar case is followed by the particles of liquids and gases respectively. Please reply me sir. 😊🙏

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I am waiting for you reply

[@itzthegodxx292]

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[@ananyascanvas8039]

region of high pressure- compression Radio wave Sound travels faster in solids that liquids as SOLIDS ARE PACKED TOGETHER TIGHTER THAN LIQUIDS AND GASES hence sound travels fastest in solids. (Hoping my Answer is Right) simple and great explanation, thankyou

[@adityasingh4717]

Electromagnetic wave should be correct for 2 nd question ......rest are fine

[@sangeethab5829]

How radio waves?????

[@GangaDhanuka-c7i]

A 1 compression and rarefaction A 2 electromagnetic wave A 3 Sound travels faster in solid as compared to liquids and gases because they have very less intermolecular space between them which causes fast action of compression and rarefaction.

[@gamingseries2766]

When he went to the moon part I was checking my volume button like an idiot 🤣🤣

[@JerryAlumka]

Lol

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Actually

[@adorbsxyoyo]

This was so much help for my preparation for my exams! I hope this helps in my written and orals! Thank you so much❤️❤️

[@birdworld2748]

First region of high pressure is known as compression and region of low pressure is known as rarefraction. Light Because solid particles are more close to each other than liquid and same in the case of liquid their particles are also to close as compared to gas so the sound travel faster

[@sami5924]

Reason**

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[@mrsayed6151]

High pressure region: Compression Low Pressure: Rarefaction The wave which not need a material medium Is called (Electromagnetic waves) _E W IN solid the particle so much close so Sound travel faster And Liquids the particles close as compared to fade In gase The particle very far away from each other

[@d.saijeeth9680]

Q1) High region - Hills Low region - valley Q2) Electromagnetic waves, Light waves Q3)The sound waves move through each of these mediums by vibrating the molecules in the matter. The molecules in solids are packed very tightly. ... This enables sound to travel much faster through a solid than a gas.

[@kanikataneja6813]

Sir u are seriously an ideal teacher. U r way of explanation is wonderful....

[@mihir72-b9q]

1. Compression and rarefaction respectively. 2.electromagnetic waves. 3. Waves travel much faster in solid medium in comparison to liquid is because the molecule in a solid is much closer in comparison to liquid and the same rule is applied for liquid and gas

[@loiseshiimi3204]

I think 1. Areas of high pressure are compressions and areas of low pressure are rarefactions 2. Light does not need a medium to travel through 3. Because in solids particles are closer together and are able to transfer the sound energy much quicker to neighboring particles than in Gass where particles are further apart

[@alimuminalimwinyi3836]

Q1.. high pressure - compression low pressure - rarefaction Q2.. electromagnetic waves Q3.. this is because solids particles are closely packed to each other compared to liquids and gases..

[@himanshushekhar1528]

Answer of questions:- Q.1) In a sound wave , compression is a region of high pressure and rare faction is a region of low pressure. Q.2) Electromagnetic wave does not need a material to travel. Q.3) The molecules in solids are packed very tightly as compared to liquids is not packed as tightly. This enables sound to travel much faster through a solid than a gas. sir pls like

[@Drflizzy]

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[@samyogpoudel4555]

Q1 = high pressure : conpression Low pressure : rarefaction Q2 = transverse wave Q3 = because the molecules are compact in solid

[@Huzaifah1509]

Q1: high pressure= compression Low pressure = rarefaction Q2: electromagnetic Q3: solids atoms are close to each other followed by liquids and then gases

[@sganeswarrao9729]

Nice answer

[@jnuchina]

Very fine sir, I could understand the concept very easily...

[@ManochaAcademy]

Glad to hear that

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[@harshitsinghGRIND]

@@ManochaAcademy sir i hope my answer is correct

[@abdulali1583]

Q1 answer is compression and rarefaction Q2 answer is electromagnetic wave Q3 answer is particles are close to each other in solid, partcles are far away in liquid and particles are very far away in gases

[@ManochaAcademy]

Super! All your answers are correct :) Also try the Quiz for this video on my Website. Quiz button is below the video: www.manochaacademy.com/physics/sound/l/propagation-of-sound

[@mmahalakshmi9567]

9:28 Another example can be that the hunters in forest keep their ears in the ground to hear the footsteps of animals which approaching very fastely against them

[@princekukreja6795]

True

[@vidyajyothi7625]

1.High pressure is compression and low pressure is rarefaction 2. A light wave (transverse wave) 3. The particles in solid are closely packed hence sound travels faster in solids . In liquids the particles are closely packed as compared to gases so sound travels faster in liquids as compared to gases . The particles in gases are far apart hens the speed of sound is least in gases

[@raunaquejahan3834]

1.compression and rarefaction 2.electromagnet wave 3.solids are more close to each other as compared to luquids and gases.

[@soeoy4828]

1) In a sound wave the region of high pressure called compression and region of low pressure called rarefaction . 2)It is a electromagnetic waves which does not require medium to travel. 3)Sounds travel faster in solids because particles of solids are closely packed and they have very less intermolecular forces of attraction.

[@manmohan-119]

1.Compression and rarefaction 2.Electromagnetic wave 3.Because In solids their particles are tightly packed as compared to liquid and gas and so on in liquid it is tightly packed as compared to gases .

[@amruta9489]

1. In sound waves, region of high pressure is known as compression and region of low pressure as rarefaction 2. Electromagnetic waves 3. Because, molecules in solids are closer than compared to molecules in liquid and closer in liquid as compared to gases

[@Norikakong8640]

Thank you sir! Great explanation my concept is now clearer than glass 🙏🏻🙌🏻

[@nikolatesla6617]

Q1: compression and rarefaction Q2: light wave Q3 :because the particles in solids are closely packed and in liquids the particle are not closely packed when compared to solids besides in gases the particles are moved far away from each other

[@devskutts]

1. high pressure region : compression low pressure region : Rarefraction 2. Electromagnetic waves 3. NOT SURE : The atoms of solids are very close to each other which enable them to pass on the vibrations easily than liquids and gases where in liquids and gases they are much apart from each other .

[@Fp30501]

thank you

[@HhjhKohjhh]

Thanks for your answers

[@SaRa-k5f]

Thank you for the lesson My answers 1.compression and rare faction 2. Light waves 3.sound travels faster in solids because they are closely packed hence causing the vibration and in liquid is slightly packed as compared to gases where they are free ❤thank you for the lesson

[@sushilarani7115]

1. High pressure is compression and low pressure is rarefaction 2.Radio waves do not need any material to travel 3.Sound travel faster in solid as compared to liquid due to the tightly package of particles of solid and same in the liquid state as compared with gas

[@RamRam-gs1so]

1; the region of high pressure is compression , region of low pressure is rarefaction 2: wave that does not need a material to travel is called electromagnetic wave ,ex- light 3: sound travel faster in solid because of particles of matter r very closed to each other or tightly packed in comparison to liquid n gas n hence compression n rarefaction is more in solid than in liquid n gas at a time

[@04-aranighosh-93]

1.high pressure is compression and low pressure is rarifraction . 2.electromagnetic waves 3.this is because the intermolecular space in solid is less than liquid and of liquid is less than gas.

[@SamuelAfoakwa-sr5km]

Q1. Region of high pressure is compression and region of low pressure is rarefaction Q2. Microwave Q3. This is because the particles in solid are tightly packed as compared to liquids so when a solid is disturbed sound travels faster in solids than in liquids due to the nature of the arrangement of the particles. Also the particles in liquids are closely packed as compared to gases hence a disturbance caused may result in the faster rate of sound traveling in liquids as compared to gases

[@daegaldh1985]

Q1. In a sound wave, the region of high pressure is called Compression. The region of low pressure in sound wave is called Rarefaction. Q2. A wave that does not need a material (medium) to travel is called an electromagnetic wave. Q3. Because the particles in solid are packed together. The particles in liquids are close to each other, but can freely move. While the particles in gases are far from each other. So, the summary here is : Solids > Liquids. Liquids > Gases.

[@r-aeditz5434]

Thanks 🤩

[@lubnamoideen5597]

Best teacher ever I have seen

[@ramprataprai1237]

1- region of High pressure is CMPRESSION. Region of low pressure is RAREFRACTION 2- NO WAVE 3- Sound travel fastest in solids because the molecular arrangements are tightly packed so the transfer of sound energy is fastest. But in liquid molecules are less tightly packed than that of solids, and the molecular arrangements for gases is least tightly packed so sound can not transfer Faster in gases than that of liquid and solid. My answer is complete. Thank you 🤭

[@Ali-ty6zm]

Brilliant. Absolutely brilliant. This taught me much more than the 40 minutes of droning that my science teacher did. 😁

[@ManochaAcademy]

Glad it helped!

[@srinivassiliveru3259]

Lol

[@rabbitkook937]

1. Compression and rarefaction respectively 2. Gamma rays / Cosmic radiations 3. The more the compact arrangement of material, the more the speed of sound. Hence so

[@sahinakhatun7584]

1. compessions for high and rarefraction for low . 2. electromagnetic waves dosen't need material to travel it can travel vaccum of space . 3. becacuse of space b\w particles .

[@sangeethab5829]

Q1 - high pressure is compression and low pressure is rarefaction Q2 - light wave Q3 - in solid the particles are tightly packed which makes the wave to travel easy and fast. Thus sound travels fast compared to liquid and gases

[@indira3152]

Longitudinal wave 2nd one

[@shamitam5899]

@@indira3152 No sister she is correct. If you have a doubt pls check it on google

[@mosesyedidya8305]

Question no 1-Compression and rarefractions Question no 2-Light wave Question no 3-Its because of the tightly packed particals in solids compared to liquids and the nature of particles in liquid is denser than in gases

[@shakeelkausar9135]

07:38 legends like me turned their volume up.🤣🤣🤣

[@khushisingh8885]

Same 😂😂😂

[@SkullNite25]

True

[@sunsan06]

Your English is very easy and simple😊😊

[@nandinisinha1512]

Initially..I'd like to thank you Sir Manocha...for such phenomenal explanation 😍 Secondly... 1.high pressure=compression Low pressure=rarefaction 2.electromagnetic wave 3. Because of high intermolecular force , since solid has the highest...so it doesn't take much more time to transfer sound through air particles as they are closer to each other as compared to liquid and so gases

[@GloriaMuthoni-k2v]

Q1, high pressure - compression,low pressure - rarefaction Q2: light waves Q3:This is because solids have closely packed particles compared to liqujds and liquids have closely packed particles compared to gases

[@PremKumar-w9v9r]

Electromagnetics waves

[@walikhan888]

Sir, your way of teaching and understanding is outstanding. You are beauty. Love ur way of teaching.

[@ManochaAcademy]

Thanks a lot :) Do check out more videos at www.manochaacademy.com

[@egbidiesther4364]

1.Compression is a region of high pressure while rarefaction is a region of low pressure 2.light wave,radio wave, infrared,gamma ray, ultraviolet, x-ray 3.solid have closed particles binding it together, liquid also have closed particles but not as close as solid while gas distantly apart

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