refraction of light falling normally on an interface

[@sumatiacharya140]

Sir I would say, India needs you type of teacher in each part of the whole country.

[@vilasbasare]

I just love your every lecture. You have made physics very simple. Thank you very much Sir for sharing your knowledge with us.

[@HarshKumar-jz5rn]

Learn physics by physics wallah alakh sir

[@gillnavi425]

@@HarshKumar-jz5rn it's only text book oriented dear not knowlegable at all

[@mishkat_fatma_]

@@HarshKumar-jz5rn true

[@ska4666]

Sir White board le Kar hee baith gae.. 😅, love your dedication sir..

[@MakeMeScientific]

Extremely helpful...thank you

[@ksantosh7590]

kzbin.info/www/bejne/hH3QoYGDZdiaj80 Hi sir, love your videos. pls see this if u havent seen.

[@jaimalapatel848]

Thank you sir. You are great inspiration. Love your teaching. Your smile gives off a new level of energy.. 😊

[@yashasvikumar5092]

Sir I have a question we know that speed of light in vacuum is 3 lakh km per second but as it enters a glass its speed decreases but as soon as it return to vacuum it regain its speed and what is the reason for it and what is the energy that help in regaining its speed.

[@weird0wizard22]

Yashasvi Kumar That's just so simple...Higher the refractive index is lower the speed of light will be. As refractive index of glass is greater as compared to that of refractive index of air or vaccum,therefore, light travels faster in vaccum while in the glass it travels with comparatively slow speed. #Hope it helps!☺

[@yashasvikumar5092]

@@weird0wizard22 sir I also know that .You didn't understood my question.i asked how does it regain it's speed after coming out from light.as we know to regain speed we need energy so what energy is helping it in regaining it's speed.

[@aadilkhan9074]

Yashasvi g I have same question if light is a form of energy when it inters in glass of water then light looses some energy then how light regain their speed

[@nitinranacluster1737]

It is a very typically questions it violets the newtonion mechanics after passing glass light gain its speed so there is a acceleration but there is no force.but it is unknown force.science does not say something now but in future we can define it.

[@Extraordinary10s]

Yashasvi Kumar Okay. I once too had that question lingering in my head for a while. It turns out that when light enters a medium, such as a glass, there are many particles. Now, it’s not like when light enters through a medium, the light’s speed slows down; it’s just that when light enters a medium, due to obstruction by particles, the light cannot travel in a straight line, so it takes a longer path, that is it takes many paths to reach a position. That’s why it appears as if light slowed down when it actually didn’t. Take your example itself, you travel at 5m/s. Now there’s a track, a straight one. It is 10m. Now, when you run, you would finish it in 2 seconds. Now, let there be a maze. You still travel 5m/s. Now, you start running but there are a lot of obstructions, but at the end, you finish the race. Now remove the maze, you find out your displacement is 10m but you took many paths ( let’s say you totally took 30m) so you didn’t take the 2 secs to reach there rather you took 30s . In both the cases, you still travel 5m/s but your apparent speed at 1st case is 5m/s and 2nd case, it’s 1m/s (ie 30m/30s). That’s exactly what’s happening to light when it travels in a medium. When light comes out of the medium, it again travels in straight line as there are no obstacles.

[@solapowsj25]

The decrease in speed causes the image to form at a point closer to the surface of separation of the two media. The illustration of bending shows the decrease in speed, even at the normal.

[@Aquariyaz5271]

I had a confusion on this sir, but now it's clear , thank you very much sir

[@surajprasad2551]

Brilliant explaination sir

[@ASHUTOSHKUMAR-ho9bg]

sir i have a question my question is that why light bends toward the normal when it goes from rarer to denser

[@chahatkapoor2891]

Luv you sir...

[@PriyanshuRaj-lc2se]

W

[@anayattt019]

😘😘😘

[@piyushgoel7516]

Sir thankyou very much for helping us.

[@KaranVerma-cf2qp]

Sir you are great 😊😊👍👍

[@vilasbasare]

Wish you a very happy Diwali Sir. Instead of symmetry, we can apply Huygens' principle to explain this phenomenon.

[@aman-821]

Sir Why dispersion of light not occurs in lenses .plz sir

[@vatsal512]

Yes sir same doubtttt

[@PiyushSingh-xy1qw]

Due to parallel sides

[@winterhills2012]

Sir, your explanations are superb. If you explain different concepts of physics , it would be highly appreciated. COULD YOU PLEASE EXPLAIN optical activitY, HARMONICS CONTACT ANGLE , POLARISATION , POLAROIDS. SIR PLEASE

[@mpratapofficial]

Thank You Sir My doubt gets clear 👍

[@aakashmondal7685]

Sir why the velocity of light changes in different medium? 🤔

[@weird0wizard22]

Aakash mondal Due to the change in the refractive index of the medium. Refractive index is in inverse relation with velocity. Higher the refractive index is lower the speed of light will be☺

[@ullianove151]

Refractive index depends on the arrangement of molecules in the medium.....I think...may be that's why refractive index changes when a medium is heated..so by saying refractive index we are saying about the arrangement of molecules..when light passes through a medium , the light is actually suffering reflection , millions and millions of times .. maybe this subsequent reflections are delaying its speed in a given medium( here each molecule act as a tiny mirror.) MAYBE..

[@Thephysicsplace]

Due to different dielectric constant of different refracting mediums

[@maneeshv4185]

Sir you are a legend ❤❤

[@rizwanahmad-yi3pz]

Sir, why dispersion only takes place in glass prism not in lenses??

[@SivaKumar-mu5pj]

How elastic scattering differs from inelastic scattering?

[@abhipshabehera976]

Sir. Can we hear the sound that is produced inside the water?..... The aquatic animals may produce sounds inside the water but it is not audible to us... Why?

[@gargilingwal9687]

Because it is either infrasonic or ultrasonic which humans can't hear

[@abhipshabehera976]

@@gargilingwal9687 Thank you

[@asiancollegeofteachers5870]

Sir, can you tell me the name of the symmetry that you told in this video?

[@ashergaming6215]

Sir can you plss explain twin paradox will the age remain same or different

[@willsmith8296]

Sir i have another question: If sin(i) = 0 & also because of sin(i) = 0 Sin(r) also becomes 0 So sini/sinr = 0/0 Which is not define!!

[@jaswantsinghbangar881]

kzbin.info/www/bejne/aYSVeoWwbKadj8k

[@kalyandutt]

Its called indeterminate form. It means you cannot determine its value atleast directly

[@abhinavsinha1389]

Why only wavelength changes during refraction not frequency

[@ashokengineer5503]

Sir I want to ask a question

[@philomath-mohitgupta4776]

Is there a refrain when light ray falls perpendicularly on a glass slab ?

[@mw4749]

what happens when white light is incident normally, does red rya come out first then orange and so on?

[@surabhipandey21]

Sir why we generally say that red light used in traffic light is due to its less spreading nature while according to law of diffraction red light have highest wavelength so it should spread most.

[@imagithetical6575]

Hlo sir, May U please explain us that why it's speed changes while it travels through different different medium?

[@nishantpatelvlogs2110]

Nice sir

[@akashpal7554]

Sir please explain snells law

[@hardikkhandelwal7777]

sir we consider that in a circuit 2 ends of connecting wires are equipotential , so how does current flows through them...and also if current follows the shortest path with least resistance it should move from positive of battery to negative of battery and that too inside the battery not in the circuit ???

[@samtamalhotra4399]

Hello sir I have question. What is violet color means ? Do we have atoms of this color or irs related to emissions of energy? I am confused in this subject.

[@siddharthshivwanshi8969]

Yahi reasons h ki apne ser k upper bale stars twinkle nii krte aur jo apne ser se 20-30 degree banate h bo twinkle karte dikhai dete h ??

[@tarunkumar663]

Sir how is optical density directly proportional to refractive index

[@zafferiqbalmehdi]

Sir I have a question what is optical density plz make a video in hindi language

[@inventionsextraordinary6775]

Plz can u explain me about Impulse Magnetoplasma Rocket full in detail

[@rajanigandha2317]

Sir, What happens when a light fall in a rough surface.does surface absorbes energy or what happens to the incidence ray

[@vishaltiwari3409]

But sir how a obliquely comes light rays decided to bend in which direction

[@genius7281]

Sir when light is not bending and has gone to the straight .

[@alokkumar3703]

Love you sir

[@rafezubair8222]

The perpendicular component of electric field in air is larger then the perpendicular component in medium..that's the reason why light bend towards the normal..when it travels from air to medium

[@vishaltiwari3409]

But sir how a obliquely comes light ray decide to bend in which direction

[@vinaykishore3977]

sir why wavelength and velocity of light changes in this refraction process whereas frequency doesn't change. sir i am A Vinay kishore from Telangana.

[@sangitadubey2244]

Please tell me sir postive charge electric field line are outward and negative charge electric field inword why regation

[@gownkaomler5260]

Respected sir, According to NCERT,Snells law is true for only condition (0

[@theAryanDiscourse]

thats because ncert does use the definition of snell's law very liberaly however the thing is the formulation of snell's is based upon fermat's principle that mainly states that light chooses the optimum path for travelling in a medium. here optimum may mean maximum, minimum or point of inflection and is thus open to different uses in different cases

[@bibhuduttabagar3946]

THANKS Sir.

[@Spirituallearning3655]

Sir why in vacuum dispersion off white light does not take place and why in vacuum speed of light is independent of wavelength it's too confusing please explain. Light has 7 components which having different wavelength then why in vacuum these 7 components aur 7 colours travel with different speeds that is why vacuum is non dispersion medium please explain me sir it confusing a lot🙏🙏🙏

[@VishalSingh-ln7kc]

Sir happy Diwali. Sir question According to Newtons law of Gravitation two object attached each other then why our universe expend

[@ojasvikamra6835]

all rounder bro dude .. search dark matter

[@ASHISHKUMAR-in9cq]

Are you from darbhanga, bihar

[@Rk.751]

symmetry nature ki upar ek class li jiye sir..pls

[@mdehrarahmad1519]

Sir can you please make a video on image formation in concave and convex mirror please

[@goswaminews2629]

Sir why the speed changes

[@SanjayKumarYadav-ws5ft]

Because it's speed reduces when it enters in denser medium

[@bipinmaurya3824]

Thanks sir.happy Diwali sir

[@chahatkapoor2891]

Gr8 sir..

[@tarangkala6281]

Sir how can light bend in infinite directions as per laws of refraction.. incident ray, normal and refracted ray lie in same plane.

[@kalyandutt]

Yes but for normal incidence, incident ray and normal are same and any refracted ray is still in same plane as incident ray and normal. (Think!)

[@FANCHU1977]

Sir I have another question that if velocity of light changes as it goes to denser or rarer media then it's wavelength also changes , but is it's color also change ?

[@chuingumm]

Sir but according to law of refraction the incident ray , the refracted ray and the normal all lie in the same plane then why are u taking the case of three dimensional figure and why isnt that we take it as three dimensional in case of oblique incidence.

[@kalyandutt]

We have to take three dimensional in oblique incidence also. That is where coplanarity is clearly understood

[@prakash-yq6qg]

Sir apka part 2 book +22nd year kalia ha kya

[@MahipalSingh-pw5ts]

sir I have a question that why every action has it equal but opposite reaction or simply what is the cause of action reaction

[@chandrikaprasad6513]

Force is the cause of action and reaction

[@weareandroidgamers6750]

This is because of contact force which split in to component. 1) Friction 2) Normal This normal force opposes the force that has been applied to any surface

[@vishalkhatik1847]

thank u so much sir. ....

[@radharani9932]

We know that energy is always conserved then in optical fibre Sound energy changes into light energy, how the speed increased?

[@BhartiGupta-ec6gt]

Sir why v1 has to be zero

[@Kokushibo01-um]

Buddy, V1 won't be zero becoz how velocity would be zero if velocity is zero no bending occurs then how we say the angle of refraction would be zero is becoz v1 couldn't be zero then the only option is sin r so sin-1(0) will be zero..

[@kamruddeena901]

Sir Ap apna pura content dijiy please please please please please please please please please please Please

[@weareandroidgamers6750]

From snells law!

[@yogi5918]

Hello sir please make videos on ratation

[@rishikiinna1328]

If speed n wavelength of light change in refraction then how can frequency remain same?

[@mosarofhossain8060]

Because, frequency depend on the matter's vibration for which light is created (my English is poor)

[@ankitabhaumik8611]

"Frequency is the number of crests that pass a fixed point in the medium in unit time." And hence as it depends on the source's vibration, it is constant.

[@saumyavinayakmishra4083]

Happy diwali sir

[@chandrikaprasad6513]

Sir by above equation why speed of light in second medium that is V2 can't be zero by equation we are getting that v2 may be zero

[@You12783]

you can see it go through and emerge so obviously it can't be zero, can it ?

[@ankitabhaumik8611]

V2 or any other velocity can only be 0 when the object is not moving. Here, the light rays are moving. Hence, no matter how less their speed is, it cannot be 0. And in the equation, v2 or v1 is never 0, but the product of v2 and sini or the product of v1 and sinr is.

[@koustavbhowmick498]

Sir please upload some lectures on symmetry

[@niharkantabiswal2406]

Hello sir I am Soubhagya just passed out 10th I have a question that-Why the frequency of light doesn't change in any medium or remains same in all medium?? Sir please answer it

[@ankitabhaumik8611]

The same question was igniting me too, a few months back. Frequency depends on the source of the object, velocity on the medium, wavelength on the colour of light.

[@techchota7744]

Love u sir

[@rajdama9622]

r can also be π and sinπ=0

[@rakeshmanandhar1141]

sir how real image is seen by our eye

[@dandn3907]

🎉 0:52

[@rajeevkamal1610]

In NCERT I read the incident ray and the refracted ray lie in the same plane...

[@floof5133]

Sir- That is for Reflection! Here we are studying about Refraction. 2 totally different topics.

[@shivendrabhardwaj9012]

Just want a law from you !!

[@akashkumarmehra6602]

You are great sir............

[@amanyadav8858]

thanks sir

[@roshanpanda1662]

Wow sir

[@HimanshuKumar-kt6uy]

sir plzz make a vdeo on electricity for class 10 plz make vdeo sir

[@oncechu8471]

Sir, is so cute

[@thefreak8270]

viedo starts from 4:00

[@inventionsextraordinary6775]

Namastey sir

[@maharathi9189]

🙏

[@tatvadarshitiwari7513]

Bot sir snells law is only applicable for angle of incidence is greater than 0 and less than 90 degree

[@radhikashenoy934]

Wow

[@gauravray3126]

❤️

[@Pwfollower35]

Please 🙏🥺 helpe me sir my physics is very poor I am also poor plesase help me

[@aashishyadav2615]

Physics❤

[@harsh2770]

Pradeep kshetrapal sir ke channel par jakar dekho.I guarantee u yeh ekdum samaj mein aajayega....

[@umeshchandrakoduri2702]

Let us assume that two persons are in train . According to 2nd person's frame reference 1st personis at rest.The x person who is on platform seeing the 1st person with respect with train he think that he is in motion because 1st person is moving with train compartment. What is the answer for this.The main thing whether the person is in rest or in motion?

[@tauseeqsafi4702]

What a explanation 😅😂

[@coronaman365]

But sini /sinr d. N. E

[@ab2001k]

😂😂 I'm thinking same but i never love Study.

[@chemicalsciencesbyadarsh278]

Sir Mai Bihar se hu Hindi Mai batayea

[@inventionsextraordinary6775]

Plz sir

[@jagdishprasad3415]

Sir app hindi m video bany please