Which light has the longer wavelength : red light or blue light ?

What is the order of colours in a rainbow, from the outside to the inside?

Which colour of the spectrum has

(a) longest wavelength, and

(b) shortest wavelength ?

Which colour of light has the shorter wavelength - red or violet ?

Fill in the blanks with suitable words:

(a) When a ray of light enters a prism, it bends.................the normal; as it leaves the prism, it bends ............ the normal.

(b) White light is composed of .............colours. The colour of white light deviated through the largest angle by a prism is..............