Physics

Problem

A telescope having a

0.20\,\text{m}

objective is used to view two stars. Which colour of light will give the greatest resolving power for the same telescope? a) Green light

(\lambda \approx 550\,\text{nm})

b) Red light

(\lambda \approx 700\,\text{nm})

c) Blue light

(\lambda \approx 450\,\text{nm})

d) Resolving power is the same for all colours