Physics, asked by sudhanvalm5486, 10 months ago

A star sometimes appears bright and some other times fainter. what is this effect called?

Answers

Answered by rudhar7505sharma

1

This effect is called Twinkling effect

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Answered by ParkYojun

1

Answer:

The gradual change in the refractive index of different layers of the atmosphere due to the varying conditions of it causes atmospheric refraction. When starlight enters the atmosphere, it gets refracted continuously. The higher level of air acts as a rarer medium while the dense air near the surface of earth acts as a denser medium. So, the atmosphere bends the starlight towards the normal. As a result, the apparent position of star is slightly different from its actual position.

Thus, star appears slightly higher (above) than its actual position in the sky.

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