Which of the following graph represents the correct variation of angle of incidence (i) and angle of deviation (δ)?

A: Astigmatism usually is caused by an irregularly shaped cornea.

B: Rainbow is the natural phenomenon in which dispersion takes place.

The splitting of white light into different colours on passing through a prism is called

At noon, the Sun appears white as

Twinkling of stars is due to

When white light enters a glass prism from air, the angle of deviation is least for

Which of the following is a natural phenomenon which is caused by the dispersion of sunlight in the sky?

Name the scientist who was the first to use a glass prism to obtain the spectrum of sunlight.

……….. of light causes the blue colour of sky and reddening of the Sun at sunrise and sunset.