EXERCISES

The number of surfaces bounding a prism is

A deviation in the path of a ray of light can be produced

The wavelengths corresponding to violet, yellow and red lights are ${\lambda }_v,{\lambda }_y$ and  ${\lambda }_r$ respectively.

The sky looks blue on a clear, sunny day because of

A sodium-vapour lamp emits _____ (yellow/blue/red) light.

By convention, the angle of _____ for the second refraction in a prism is denoted by $r_2$.

The colour in the sequence VIBGYOR that has the least wavelength is _____ .

A small particle will scatter light of _____ wavelength better.