Why do stars twinkle (but planets don't)? (Hindi) | Human eye | Physics | Khan Academy

Let's explore what causes the twinkling effect of stars. We will also explore why planets, sun, and moon don't seem to twinkle.
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[khanacademyindia]

Hey, here's a dedicated CBSE course on our website where you can practice all the concepts related to this video and more. And oh, it's always free.

[funwithdivyan]

Learning:
1.Twinkling of star is just changing the brightness of star continously.
Star appears very small in size because they are very far away from us.
2.Our environment is changing its density continuously due to various reasons like temperature, density of dust, density of gases, air.
3.Due to this reason sometimes more light rays of star come from us and sometimes less light rays. Therefore, they appear to be twinkle.



4.planets don't appear to be twinkle bcoz they look quite big with respect to stars.
5.when some parts of it dims the other part brightens.
6.due to this reason overall their brightness doesn't change.
Thanks

[abbasmehdi]

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[juliusdaviesd]

As an Indian in the 80's I grew up in the middle East in 'the Indian School'. I think the worst teachers from India got exiled to the Gulf. Because I never learnt anything in science and flunked badly. What sweet irony that now we Indians are the best at explaining things in the world. I feel really sad that we had no access to the internet back then, and instructors like this who are so passionate and genuine. Who knows I might have become something very different in life 😊

[rishu]

What a wonder way to show !! (4:04)
Khan sir is really something else 👌👌

[gauriudan]

4:57 Amazing 😊😊❤
The explanation as well as animation is best of all..
Thanks a lot!😊🙏🙏

[akrambd]

I have already seen more than 15 videos about this topic. But, No one has explained better than you, brother.
Thank you so much (From BD 🇧🇩)

[anushreesharma]

Bahut Mast explaynation thank you acche se samajh mein a Gaya topic

[iftekharahmad]

I m in class 11 so I know that why stars twinkle I am really amazed by the way you explain it. You made it very easy and interesting and understandable for the learner.
Thankyou very much Khan academy

[mehlavideos]

Sir Your way of teaching is very superb.

[a.i.hussain]

The best explanation I have seen in youtube. Mindblowing sir. All of my doubts are clear as crystal.

[jackhack]

This kind of explanation is very rarely seen..I am amazed 😦. Love your lectures..

[manjunathp]

To be honest ... The detailed explanation I've seen so far !!!
Others just mentioned it was because atmospheric refraction but didn't tell how did it work ( especially the bright dim effect )
Thank you so much <3

[amotionite]

Kya baat hai mtlb gjb itni mhnt ki hai smjhane mai aur kya smjhaya hai waahhhh....🙏🙏

[kvanilkumar]

Excellent explanation, I understood the topic really well. Thank you very much. 👍👍😀😀

[pranjali]

My level of understanding is now upto such an extent that i could write any answer asked from the topics explained by you...🤓

[anonymouspaul]

4:38 best moment.. Explained very well 👍🏻

[parthkhanayat]

Best video for this topic in this universe.
Khan Academy always do the best❤❤

[shubhikachenna]

This is the clear explanation on why do stars twinkle, other videos on YouTube don't give such an explanation due to which I was confused. Thank you for the video!

[sonagupta]

The best animated video on the concept of the twinkling of stars.