Why do Stars twinkle , whereas the planets do not ?
Explain in detail ( In ur own words , do not copy from books)
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Stars twinkle not because of stars. But because of the atmosphere.
Stars are very far away from Earth. Stars radiate white light (& other electromagnetic radiation) towards Earth. During the night the air layers are very turbulent and mobile. The light rays get refracted a little this way and that way and so their image position changes on Earth.
The refractive indices between the different layers of air are slightly different. So the refraction is very small. But it keeps changing due to movement of air, change in pressure and temperature. So refracting angles change. So the image position changes continuously in time. Sometimes it changes a lot, so we don't see the star. It is like disappearance.
This is the twinkling or scintillating effect of stars.
Planets do not twinkle in our eyes. Planets are much closer to Earth than stars. Planet reflect light, falling on them from Sun, towards Earth. Also, planets appear much bigger. The beam of light from planets is wider compared to that from Stars.
The twinkling effect due to turbulence in the atmospheric air, changes in temperature and pressure, refractive indices - these do not impact much. Because the refracted rays fall within the beam itself. The reflected beam from the planets includes the refracted rays. We do not see them separately. So we do not notice the twinkling of planets.
Stars are very far away from Earth. Stars radiate white light (& other electromagnetic radiation) towards Earth. During the night the air layers are very turbulent and mobile. The light rays get refracted a little this way and that way and so their image position changes on Earth.
The refractive indices between the different layers of air are slightly different. So the refraction is very small. But it keeps changing due to movement of air, change in pressure and temperature. So refracting angles change. So the image position changes continuously in time. Sometimes it changes a lot, so we don't see the star. It is like disappearance.
This is the twinkling or scintillating effect of stars.
Planets do not twinkle in our eyes. Planets are much closer to Earth than stars. Planet reflect light, falling on them from Sun, towards Earth. Also, planets appear much bigger. The beam of light from planets is wider compared to that from Stars.
The twinkling effect due to turbulence in the atmospheric air, changes in temperature and pressure, refractive indices - these do not impact much. Because the refracted rays fall within the beam itself. The reflected beam from the planets includes the refracted rays. We do not see them separately. So we do not notice the twinkling of planets.
If the planets have to appear twinkling, the atmospheric air has
to shake like the water in a pond. When water shakes or there are waves
in water, we see the reflection of moon in it, changes position, in shape etc. If atmosphere also shakes like that (perhaps in hot deserts due to hot winds), it is possible to see planets shaking or oscillating in the space.
kvnmurty:
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Thank you sir
Please ans this one also : https://brainly.in/question/1974399
please see the answer for planets twinkling.
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