Question

Name the phenomenon in the following cases
twinkling of stars
formation of spectrum
pupil appears black
object flash 16 images/s
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Answer 1

Answer:

1. Twinkling of stars

The phenomenon is atmospheric refraction or refraction

reason

• In this case the star are point source illuminates objects which are very far from us when light travels through the atmosphere it bends, and due to this the amount of light entering the eye is different each time which gives the twinkling effect.

2.formation of spectrum

When electrons move from a higher energy level to a lower one, photons are emitted, and an emission line can be seen in the spectrum.

3.pupil appears black

The pupil is a circular opening located in the center of the iris of the eye that controls the amount of light that enters the eye. It appears black because most of the light entering the pupil is absorbed by the tissues inside the eye.

4.object flash 16 image per second

refraction