A really fantastic and enthusiastic lecture.Concepts become easy with visual graphical presentation that is only possible in Byju's I think...You explained well. Doubt: (i) Are the lengths of the the apparent distance and actual distance the same? (ii)You said that we see the continuous disturbance of a person in front of a bonfire.Then why planets do not twinkle with the changing atmosphere? We also know that a person as well a planet both have multiple point sources. By the way, sir please try to bring these type of sessions more. Thankyou...
Hey Souvik. Loved your questions..... 1. No they're not the same. I've done a session on this: ua-cam.com/video/9NfJCbCtWV4/v-deo.html 2. The person flickers because they're close to you and have different patterns on them where you can gauge the difference if they flicker. Try with a white chart paper, and you won't get to see the flickering, but if the chart paper has something drawn on it... you'll see the flickering
Homework Answer :- The stars are very, very far away from our solar system so they appear to be very small to us, although in fact they are large. The planets are much closer, inside our solar system so they appear to be larger to us than the stars.
Planets are much closer to the earth and they can be perceived as a collection of point sources that are uniformly distributed...so if one point flickers the other point also does but it nullifies the effect...the net effect we see that the collection of point sources that is a planet as a whole does not twinkle.... In the case of stars as they are very far away they are perceived as a single point which when flickers due to atmospheric disturbances and refraction does not have other points to compensate or nullify the effect as in planets....therefore they appear to flicker or TWINKLE....twinkle twinkle little star....😊
HW: The Stars are actually big in size but it appears to be small... Because it Very far from us and the refractive index is changing and we're seeing the star is twinkling ❤
I had a doubt Sir , When stars twinkle why do they get dimmer or brighter? Since all of the light rays are getting refracted why are some not refracting and reaching our eyes?
Question: how would the duration of a day get affected if 1) the thickness of atmosphere is increased 2) concentration of carbon dioxide in air is increased 3) sun emitted purple light in stead of white light ?
Sir I have a doubt If we see the stars are flickering for the atmospheric refraction so why we don't see that the planets are flickering? Is it because they don't have their own source of light?
starts to appear small but actually huge because there are way far then us and their light may get scattered by some particles after it very less light come into our atmosphere ( it may be absorbed by some planets and after it re-emit by planets again decrease ) ^_^
sir , you said planets dont twinkle because they are closer to us , what about exo planets , they can be in the other end of the milky way or even a different galaxy millions of light years away from us , why dont they twinkle ?
Sir i believe that starts a ginormous gaseous substance as they are far away from our eyes not just some normal distance like all our planets including sun they are comparatively closer to os but stars are very far away like at infinity so thats why see consive them smaller near to a dot like in addition our eyse consist of lenses not mirrors like concave or convex which make infinity objects aaper near i would ask please correct me if i m wrong thnks
A really fantastic and enthusiastic lecture.Concepts become easy with visual graphical presentation that is only possible in Byju's I think...You explained well.
Doubt: (i) Are the lengths of the the apparent distance and actual distance the same?
(ii)You said that we see the continuous disturbance of a person in front of a bonfire.Then why planets do not twinkle with the changing atmosphere? We also know that a person as well a planet both have multiple point sources.
By the way, sir please try to bring these type of sessions more.
Thankyou...
Hey Souvik. Loved your questions.....
1. No they're not the same. I've done a session on this: ua-cam.com/video/9NfJCbCtWV4/v-deo.html
2. The person flickers because they're close to you and have different patterns on them where you can gauge the difference if they flicker. Try with a white chart paper, and you won't get to see the flickering, but if the chart paper has something drawn on it... you'll see the flickering
@@BYJUSClass910 wonderfully said, thank you sir!!
Homework Answer :- The stars are very, very far away from our solar system so they appear to be very small to us, although in fact they are large. The planets are much closer, inside our solar system so they appear to be larger to us than the stars.
but what about exoplanets outside the solar system and maybe in a different galaxy or cluster itself ?
@@mnbvcxz1449they don't have their own light mate, stars do have their own light.
Planets are much closer to the earth and they can be perceived as a collection of point sources that are uniformly distributed...so if one point flickers the other point also does but it nullifies the effect...the net effect we see that the collection of point sources that is a planet as a whole does not twinkle....
In the case of stars as they are very far away they are perceived as a single point which when flickers due to atmospheric disturbances and refraction does not have other points to compensate or nullify the effect as in planets....therefore they appear to flicker or TWINKLE....twinkle twinkle little star....😊
HW:
The Stars are actually big in size but it appears to be small... Because it Very far from us and the refractive index is changing and we're seeing the star is twinkling ❤
I had a doubt Sir , When stars twinkle why do they get dimmer or brighter? Since all of the light rays are getting refracted why are some not refracting and reaching our eyes?
So Sir, between sunrise and sunset we still have a 2 min difference?
Question: how would the duration of a day get affected if 1) the thickness of atmosphere is increased 2) concentration of carbon dioxide in air is increased 3) sun emitted purple light in stead of white light ?
if we can see plants correctly then why we see apparent position of sun
Homework question:
As stars are very much far away as compared to planets in solar system..thus they look point sized due to distance.
Sir I have a doubt
If we see the stars are flickering for the atmospheric refraction so why we don't see that the planets are flickering? Is it because they don't have their own source of light?
Sir if we see the sun for 2 min extra in the evening then will the light also reach usfor 2min extra?
starts to appear small but actually huge because there are way far then us and their light may get scattered by some particles after it very less light come into our atmosphere ( it may be absorbed by some planets and after it re-emit by planets again decrease ) ^_^
sir , you said planets dont twinkle because they are closer to us , what about exo planets , they can be in the other end of the milky way or even a different galaxy millions of light years away from us , why dont they twinkle ?
you don't have to be curious everywhere because those lines are of NCERT not even of his own.
Good
Sir i believe that starts a ginormous gaseous substance as they are far away from our eyes not just some normal distance like all our planets including sun they are comparatively closer to os but stars are very far away like at infinity so thats why see consive them smaller near to a dot like in addition our eyse consist of lenses not mirrors like concave or convex which make infinity objects aaper near i would ask please correct me if i m wrong thnks
As stars are very far from us
Hi siirre the best one
What is atmospheric refraction
Hi
What is the most imp topics for boards from ch 3 the human eye and the colourful world ?
All concept bites are on important topics only. Hope this helps :)
@@BYJUSClass910😮😮