Question

When a white ray of light passes through a prism, it gets dispersed. Why? Which
colour deviates the most and which colour deviates the least?​

Answer 1

Answer:

Reason for dispersion - Difference in speeds of lights of different colours in a medium other than air(or vacuum)

Colour deviating the most - Violet

Colour deviating the least - Red

Explanation:

Let's have a look at the explanation as well.

Reason for dispersion-

The white light we usually see around (from Sun) is constituted by seven different colours.

Each of these coloured lights have different speed in a medium other than air(or vacuum)

The coloured light which has the smallest wavelength has less speed and vice versa.

Hence, the colour of light that has smallest wavelength deviates more.

Colour deviating the most-

The coloured light that has the smallest wavelength is violet.

Hence, it has least speed in glass.

Therefore, it deviates more.

Colour deviating the least-

The coloured light that has the largest wavelength is red.

Hence, it has highest speed in glass.

Therefore, it deviates least from its path.

Quick Tip-

The seven colours of lights can easily be remembered by the following word,

V - Violet

I - Indigo

B - Blue

G - Green

Y - Yellow

O - Orange

R - Red

#bal

#answerwithquality

Answer 2

Answer:

Explanation:

Violet is bent the most and red the least because violet light has a shorter wavelength, and short wavelengths travel more slowly through a medium than longer ones do. Because white light is made up of ALL visible wavelengths, its colors can be separated (dispersed) by this difference in behavior.