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

(i) Å, and

(ii) nm?

Name four colours of the spectrum of white light which have wavelength longer than blue light.

Name three factors on which the deviation produced by a prism depends and state how does it depend on the factors stated by you.

How does the deviation produced by a triangular prism depend on the colour (or wavelength) of light incident on it?