Assertion (A): A beam of white light gives a spectrum on passing through a hollow prism.

Reason (R): The speed of light outside the prism is same as the speed of light inside the prism.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is not the correct explanation of A.
3. assertion is false but reason is true.
4. assertion is true but reason is false.

How does the speed of light in glass change on increasing the wavelength of light?

Name the subjective property of light related to its wavelength.

What is the range of wavelength of the spectrum of white light in —

(i) Å, and

(ii) nm?