Sound | Full Chapter Revision under 30 mins | Class 8 Science

Access the PDFs of 'Chapter notes' and 'Most important questions' of Grade 8 Chapter 'Sound':
byjus.com/ncert-solutions-cla...
➡️ Download the BYJU'S App Now:
IOS Link: apps.apple.com/us/app/byjus-t...
Android Link: play.google.com/store/apps/de...
➡️ Join your free class @BYJU'S Now:
byjus.com/byjus-classes-book-...
📢Join our Telegram Channel:
t.me/byjusclasses678official 🔔
👉SUBSCRIBE here & don’t forget to turn on your notifications 🔔
/ @byjusclass910
#BYJU'S

[@gamingstar2720]

Legends come before exam 😂

[@bloggernirjal6316]

Ha bhai 😅

[@yaartandcraft1424]

Toh kya exam ke baad aoge

[@sohelali2063]

Yes bro

[@SheetalMishra-ql3yq]

Mera aaj hi exam h mai ye subah subah dekh ke ja rhi exam Dene.. 😢😅

[@2009_Smiling]

Got an Exam tomorrow 😅

[@shubhiverma4607]

Our teacher gave us an example of noise : (Students understood 😅) Sir she said the class the students perfect example of N-O-I-S-E . Then I understood okkk that's why whe always remember the name of all the naughty students first 🥇 She says (❤when you all will go to ninth you will forget us but I've seen whenever old students come to meet there teachers very old teachers mostly remember naughty students 😊❤) but teacher even sir they all love us equally 🤩 SIR I HAVE EXAM ON MONDAY AND WHEN MY RESULTS WILL COME SURELY I WILL TELL SIR 😊 thank you

[@ananyasartisticworld9640]

Lightning is the spark that can be seen in the sky during rains and thunder is the loud sound heard just after lightning.though they occur at the same time lightning is seen before thunder is heard ,this is because the speed of light is much more than the speed of sound.The speed of light in air or vaccum is approximately 3*10⁸m/s and the speed of sound in air is 343m/s.Thus,the light from lightning travels to us much faster than the sound produced by it.

[@fusiongaming132]

actually sound cannot travel in vacuum so you can correct you comment

[@veergaming4]

Google 😊 19:39

[@juniourkitchen1239]

Seedha answer Light travels faster than sound

[@anumshaikh5792]

she said that "the speed of sound in air is 343m\s....."@@fusiongaming132

[@dramatic_innocence]

You are wrong the answer is right

[@saritasharma4992]

All the best for your tomorrow exam

[@jaypalsingh4982]

Mine is today

[@vasantsaini193]

Thanku

[@maltinegi4315]

Thank u sir for this wonderful session .

[@artbyalish]

The speed of light is more than sound due to more speed of light it reaches us before sound therefore lightning is seen earlier and sound is heard later

[@PujaKumari-gv8id]

Tysm I have exam tomorrow 😂😂

[@HarshRathore-qo7zn]

Like karo agar tum exam se pehle aaye ho

[@ramgopalsoni9478]

well explained sir please upload a rapid rivision of crop production and manegment class 8 .....

[@educationaltechnology11811]

Sir iam cbse our exams are coming on April 1 can you conduct any tests, quiz , or mind maps? Because I saw your video in light and also in many lessons too but that light lesson had good mind maps.

[@shivanipandey4206]

Ans - the light trevels at the speed of 300000km/sec. Which is very large in comparison to the speed of sound which trevels all then 3.30 m/sec. In air :that is why lightning is soon at the rate earlier and thunder is heard later 😊😊

[@priyanshiallrounder]

Because lightning have frequency than thunder strom etc

[@Creator_boy257]

False

[@samridhigodiyal9720]

Lightning and thunder takes place in the sky at the same time and at the same distance from us but light travels faster than sound.

[@rathodgamer5556]

lighting is seen earlier because speed of light is 3*10^8 m/s whereas the speed of sound is 340 m/s .Therefore we see thunder initially and hear sound later

[@RouhanKhan-rf7cp]

Lightning is see to be earlier during the thunderstroms this is because the lightning travels with more speed than sound produced in a thunderstorm

[@user-oz8qg4bh7j]

Thank you sir.... in class I didn't understand this chapter that's why I'm seeing this video Thanku so much sir❤😊sirr aap live lelloo

[@newexplorewithme]

HW question:- bcz speed of light is faster than Speed of sounds 👍🏻😊

[@ANIME.424]

Sound effects were wonderful sir.

[@gauthamsubhash354]

Thankyou sirrr😊❤

[@mita862]

Sir make a video on chemical effects

[@thejinkarushi]

sir mejhe app ki wajha se paad aa gaya

[@thejinkarushi]

bichara mai

[@carunews1968]

Wtf? 😂😂

[@shivanipandey4206]

But sir my school teacher say that formula of frequency no. Of oscillation / time period can you clear this please 🥺

[@mamtachaudhary9080]

The lightning and thunder are seen when there is a heavy rain and lightning is seen before than thunder because you generally seen that if lightning 🌩️⚡ falls on somebody or something it will burn it and it is because of the high speed of lightning so lightning is seen earlier because speed of lightning is very much higher than the speed of thunder, thunder speed is 330m/s and which is very less because speed of lightning is seen and calculated as 3 × 10 to the power 8 hence, lightning is seen earlier than thunder

[@sanskritigupta1197]

Lighting and thunder take place in the sky at the same time and at same distance from us. Lighting is seen earlier and thunder is herad later as speed of light is more than sound.

[@thealphagirl5571]

the speed of lightning is faster than that of thunder as light travels faster than sound.

[@user-sx7hq8yw1o]

The classs was too good

[@meenukharbanda1676]

Because light travels in air faster than sound

[@Its.Saanviii]

Answer: It happens because light travels faster then sound that's why the light can be seen first and sound is heard later. Thank you for this amazing session sir😊

[@vyasutsavi]

Light travels faster than sound so we see a flash of lighting before hearing the sound of thunder

[@SaiSaketh-hl2fi]

Lightning and thunder occur at the same time and distance from us. However, lightning is seen before thunder is heard because light travels faster than sound. Light travels at a speed of about 300,000,000 meters per second, while sound travels at 340 meters per second.

[@poshali1234]

Thankyou sir for a bringing such a great, amazing and useful session for us.......❤❤💛💛💖💖

[@N.c_editz27]

It's because of time traveling of sound wave😊

[@blacklover33318]

Because speed of light is greater than speed of sound

[@rajeevyadav3059]

Good evening sir

[@mychannel_62]

We hear lightning first because the speed of light is more than the speed of sound hence, thunder is heard later.

[@educationaltechnology11811]

The speed of light is 300000km/s and the speed of sound is 330m/s . Light travels faster than sound.....Hence lighting is seen earlier and sound that's the thunder is heard later

[@anushmitadass]

speed of light is greater than the speed of sound that is why during thunderstorm lighting is seen earlier and thunder is heard later

[@ristasingh5a498]

❤

[@mraadii94]

Sir please teach us on smartboard

[@pampasamanta8428]

I see the video 1hour before the exam

[@Ruhangamingyt970]

Because speed of the sound is slow than light

[@artsbyseher5213]

Will we having these kind of videos for ch 11 , 12 and 13 class 8?

[@bhavyaasharma4185]

Hi sir ❤❤❤❤❤

[@ManoharARao-wd7cu]

Homework:- The speed of light is fast....so lightning comes way before the thunder. The sound propagating through medium air is much slower ...so it will come way after the lightning

[@archanagautam9836]

Speed of light is more faster than sound that's why wee see lightning first and listen song later

[@GSkitty]

Got 97 percentage in the exam because of you 🥰

[@anushkas.p.anushka]

Please, life especially School mein kaam competition tha Yahan par bhi.

[@kishugaming0007]

Because light speed is faster than speed of sound 🤞

[@rajlaxmis2968]

Because light is fastest in whole universe and that why we see lighting earlier then thunder ⛈️

[@I_Simrxn]

Lightning is seen earlier as the speed of light is way much as compared to the sound and we hear thundering a bit later......

[@Thejas_Plays]

Sir the homework answer is speed of light is much faster than the speed of sound by which we hear thunder later

[@user-vz3jn5qg2n]

can I please have the link of one short......

[@aviralsbhaktidham9230]

SPEED OF SOUND IN AIR IS 346 M PER SEC THATS WHY WE CAN HEAR SOUND LATE

[@Riyaprajapati-jc8pp]

Hello sir how are you sir 😊

[@designembroidery123]

can you please send the timetable

[@Priyanka_hudda]

1:12

[@RealPolluxCraft]

Because light is faster than the sound so first we can see the light and then hear the thunder

[@divyabharti3629]

Like please 😅 if you don't like then anty ka beta bunty

[@itzananya301]

19:56

[@dilsadaayan4333]

Because light can travel faster than sound and another reason is sound is travel slow in air

[@NotPro_Bee007]

18:41 Because speed of light is faster than speed of sound 👍

[@QueenLadybugCovers]

Lightning and thunder take place in the sky at the same time and at the same distance from us but Light travels faster than sound. thank you, sir, now I understand this chapter better than before. :)

[@vandanaaadhya7345]

10:49

[@LE_DRAGO]

Because light is speeder than sound so lightning is seen earlier and it is sound later

[@luckygurjar1706]

The speed of light is more than sound

[@juniourkitchen1239]

As light travels faster than sound

[@rama.nationz]

Well explained sir thanku so much

[@seeratsingh5075]

because speed light is 3 *10 power 8 but sped of sound is less

[@AtomicStudent]

Homework question ❓ Cause light travels Faster than sound

[@fusiongaming132]

because the speed of 330m/s and the speed of light is 300000000m/s because of this we can see light earlier than the sound thank you

[@devallfactz2965]

In short I think the light travel more faster than sound and that's the reason.....

[@KunalSharma-hc2px]

Ans :- 1 upon F so, frequency is 100 therefore 1 upon 100 equal to 0.1s

[@user-ut1rq7rb3q]

Hii

[@Tarun2469]

Mera exam hai kal or mene abhi Tak kuch nahi pada hai or vo bhi Animal dack ne ke baad 😂😂 rat ke 12:00 beje 😂😂😂

[@user-gp4bv3qt5r]

8:28 hii

[@Lets_Glance_ItOFFICIAL]

4th one❤

[@gajendrakumar8972]

Thanku sir but aap jo english bolta ho na mujha toh samaj aa gayi but sir jin bacho ka liya aap ya video dalta ho na vo toh english samaj hi nii pata hoga Sir

[@rashimanjunath3015]

Because light travels faster than the sound

[@user-wy5rl6yo4m]

2.45

[@musicdevil8262]

Funny line 5:10😂😂😂

[@naughtykittugupta8711]

Speed of lightning is more than speed of thunder

[@anishameena7847]

Mja l roe 😂

[@ishansingh2604]

14:44😅

[@shaziyasiddique5356]

tak tak tak aha 5:10

[@TheProArtist531]

Ans:- because sound travels slower than light

[@Aditya-dx6ib]

Because the speed of light is faster than the speed of sound

[@kshamabohare-jq3gj]

Because the light travel faster then sound and sound traval slower then light that why we see light first and sound later

[@GALAXYEDITZ28]

Lighting struck fast because speed of light is faster than the speed of sound

[@ristasingh5a498]

20 hg se 2000hg tak hi sun sakte hai humans like karo jisko fact aacha laga

[@Isha_prajapati]

answer: because the speed of light is more than that of sound

[@Creator_boy257]

Speed of light is 3000000meter/second

[@user-nh2us3uj4i]

Home work questions Because speed of light is more than speed of sound

[@gaming__7779]

speed of light is more than speed of thunder .

[@sanikagudipadu]

speed of light is faster than speed of sound

[@Vedank1928]

Got a nice revision from this video thanku sir

[@aa-gt9tp]

When a asteroid come and hits Earth when the first the lightning afterwards sound like a bomb everyone say lightning first

[@ervinz2407]

cuz light travels faster than sound eachiii

[@sumanmeena7778]

Ans. The speed of light is greater than speed of sound.

[@neetasarnaik1624]

Melus, incus, steps

[@unknown-ch7zy]

Hindi me bhi thoda bol liya kariyeee sir

[@parthtambe7a360]

6 th comment