Question

What is dispersion of white light write its causes 0?

Answer 1

------------------------------------------------------------------------------------------------------------------------

QUESTION : What is dispersion of white light ? write its causes.

ANSWER :

WHAT IS DISPERSION OF WHITE LIGHT..??

• The splitting up of white light into its component colours is called dispersion.

CAUSES OF DISPERSION WRITTEN BELOW :

• From Snell's law of refraction , the angle of refraction of light in a prism depends on the refractive index of the prism material. Moreover, the refractive index of the material varies with the speed of light. The different constituent colours of white light have different speeds in the transparent material of prism. Hence for each colours , the refractive index of prism material is different.

• Therefore , each colour bends through different angle with respect to incident ray, as they pass through the prism. The red colour has maximum speed in glass prism, so it is least deviated, while the violet colour has minimum speed so its deviation is maximum. Thus, the ray of each colour emerges along different paths and becomes distinct.

THAT'S IT...!!

------------------------------------------------------------------------------------------------------------------