Out of the following, the colour of light having the maximum wavelength is:(a) violet (b) indigo (c) green (d) orange

(d) orange

Explanation

In the spectrum of white light, Red light has the longest wavelength and the least frequency (least deviation), whereas, violet light has the shortest wavelength and the highest frequency (maximum deviation), among all the colours in the visible spectrum.

As we go from red to violet (top to bottom) the wavelength keep on decreasing while the frequency keeps increasing. Thus, among the given colour of light, orange would have the maximum wavelength.