Question

Assertion (A) : White light on passing through a glass prism splits into its component colours as such that red light emerges nearest to the base of the prism. Reason (R) : Wavelength of red light is more than other component colours, and hence red light deviates least.

Answer 1

Assertion is false, but reason is true.

But why?

• Whenever white light is passed through a glass prism, the various components of white light undergo differential deviation.

• This leads to splitting of white light and a phenomenon called dispersion occurs.

• However, red light has the highest wavelength among all the other components and hence undergoes the least deviation. So, reason is true.

• But, due to its leas deviation, red light emerges farthest from the base of the prism. So, assertion is false.

$\star$ Please see diagram.

Answer 2

Explanation:

But a is false R is true ok ji sahi