Refraction and Dispersion of light | Class 8th| DAV Board | science| |full explanation

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Dear students... 'Density' and 'optical density' are different from each other... Density is mass per unit volume... Means jo same volume ki objects hongi unme se jo heavy hogi uski density jyada hogi... For example wood piece and iron piece agr same volume ke ho to iron heavy hota h so density iron ki jyada hoti h wood se... I hope it will be helpful for you 🙂👍🏻

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Sir toward normal wala nehmi samjha 1 din me exam hai. Sir plz

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15:24

[@Rajeevsir1234]

Dear students... Thanks a lot for your valuable compliments... Many students are asking about optical density, let me clear... 'ability of a medium to refract light can be expressed in terms of its optical density'. Also remember- More the optical density of a medium, more the light will refract hence shower will the speed of light in that medium... I hope u can now easily understand 🙂

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Very soon

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Sir pls come back to youtube😢

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randomly found this channel ,,,,....thought to try .... really worth to understand for students quickly .... specially for the ones like me who study...... a night just before exam 🤣🤣😅😅😅😅 very nice explanation sir 🤗

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Best teacher in the world

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Yes sir your best teacher

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Thankuu sir You are explaining good, after watching this vedio I have no doubt releated to refraction of light

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thank you so much sir u really explained it so easily i thought this chapter is going to be a mess but after watching this first video this looks so easy to me🙂🙃

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Bahut acche se samjh mein aaya sir thank you sir

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Sir app meri exam time me bahut help krte ho thank you so much

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All the best for future exams😊👍🏻

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Sir you legit deserve 1 million subscribers for your hardwork and good explanation ☺️ it helped me a lot to prepare my self for upcoming exams 😀

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Ap sab baccho ka support bahut khusi deta hai👍🏻☺️

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Your comments value is more than 1 M subscribers 👍🏻🙂

[@normally_ankit]

@@Jsrrr12 how about 7.2 billion subscribers?❤️🔥

[@normally_ankit]

@@Jsrrr12 but there are 7.9 billion people in the world 🤣. It's technically not possible bro ❤️🤣

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@@Rajeevsir1234 🙏🏼 welcome sir ❤️ our support will always be with you ❤️

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Sir thanks a lot for this incredible explanation.. last year i scored 74.5 in my science (finals), but this year, suddenly my grades went down because of the sudden jump (and probably even overconfidence) but now i am again able to understand science by the help of ur videos.

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I easily understand this video sir very nice sir

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Sir very very very best explanation sir ☺️☺️

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Thank u sir Gr8 explanation.......

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And we can learn from it

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Sir aap bahut acha padhate ho

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Sir, B is rarest and C is denser

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Thanks for explaining the ch

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Sure👍

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@Rajeevsir1234 , Thank you sir for you this much awsome explanation but I can't understand the *rarer to denser- goes towards normal *denser to rarer- goes away from normal 15:13

[@sachidanandprasad1054]

sir glass is denser or rarer

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Please Sir make more videos your explanation is really good and it make the concept very easy l understand this chapter only because of you please make explanations videos for the rest chapters and also for 9 class. Thank you sir😇😇

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Mza aagya sir sab smjh aagya

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@@Rajeevsir1234 Sir kar diya aapki explanation bohot acchi hi hai thanks a lot sir 😊

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@@Rajeevsir1234 sir force and pressure ch ki bhi video bna do whiteboard pe. By the way your explanation is wonderful

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❤❤❤❤ thanks sir for this amazing video 😊😊😊I really enjoy 😊😊😊❤

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Most welcome 😊

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very nicely explained sir please make more vids related to dav 8th boards

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Sir kindly upload rest topics of this chapter as soon as possible please sir🙏It's my humble request to you

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Thanks for your comment... I will upload soon

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Ladenge watching it one day before exam 🔥🔥

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Sure

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Optically denser = c optically rarer= B

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Thanks for explaining sir

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Best For DAVians

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sir bahoot aachi vedio hai

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Thank u sir...

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Finally I understand that topic that you teach me

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Sir thank you for your help

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[@avnuyadav2398]

Denser - C Rarer - B

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god bless you sir...sach me video bahut hi helpful thi...and after watching this i can answer all the problems/questions that is asked by my physics teacher!..sir aap likes dekh kr demotivate mt hona...jld hi aapke bahut likes honge..nd please app apne channel ko continue rakhna and sample papers bhi solve krwaie...tysm teacher..

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Great job

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So much excellent video

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Sir aagar light rarer to denser jaege to woh normal ray ke close aege na ?

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Yes👍

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Great explanation sir...

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Sir would Jo coin Wala activity thi na usko downward se Dekhna h aapne usko upward se Dekhna ko kaha tha

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B is the raresest and c is the denserer

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thanks sir😇😊

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Where is notes

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Osm😊

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Thanks sir good explain

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I can say your explain in detail which I dint find any other class.

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Thanku thanku so much sir you teach very very well.. sir aap ek aur chapter please padha dijiye na plz sir chapter no 11.... The human eye Ka please sir..

[@Rajeevsir1234]

I have started human eye chapter

[@MURSHID-dz9pr]

Sir ch friction ka bhi bana ke video upload kar dijiye na

[@mahendarsingh4613]

Thanks sir for explanation but ap dispersion explanation krva dijiye

[@Rajeevsir1234]

Already uploaded video 😊

[@meghashree438]

Can anyone explain me is this is important that the medium which we have taken for refraction is transparent is this is important and if it is important please explain me why please please

[@Rajeevsir1234]

Yes... Medium should be transparent

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Thanks you

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Very deserving sir

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Sir aap boards ke ppr check krte ho kyaa?

[@Rajeevsir1234]

Yes beta some times… but not class 8th

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Sir, u explain very good! 💖✨ But sir where we can download the notes! Plz circulate it fast sir! Lots of support from odisha! 💖✨👍🏽

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Sir please try to make class 9 videos 💯💯💯💯

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Very helpful

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Glad to hear that

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Thank you so much bhaiya... I subbed

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Thank u😊

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@@Rajeevsir1234 Welcome sir...And sir main kehna chahta hoon ki plz aap class 9 mein bhi continue kariyega

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Nice sir ⚡❣️

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Thanks 🤗