Question

Two point white dots are 1 mm apart on a black paper. They are viewed by eye of pupil diameter 3 mm. Approximately, what is the maximum distance at which dots can be resolved by the eye? [Take wavelength of light = 500 nm]

• A. 6 m
• B. 3 m
• C. 5 m
• D. 1 m

Answer 1

The correct option is C 5 m

The resolving limit is given by $\frac{1.22\lambda }{d}$ . Use this formula and find d.
Watch the next video for the solution.