Question

Diameter of human eye lens is 2 mm. What will be the minimum distance between two points to resolve them, which are situated at a distance of 50 meter from eye.The wavelength of light is 5000 Å

• A. 2.32 m
• B. 4.28 mm
• C. 1.25 cm
• D. 12.48 cm

Answer 1

The Correct Option is C

For the aparture, limit of resolution – 

\(\frac{y}{D}\geq \frac{\lambda}{d}\) \(\Rightarrow\)\(y\geq\frac{\lambda D}{d}\)

\(\Rightarrow\)\(y \geq\frac{5\times10^{-3}}{2\times10^{-3}}\times50\)\(\geq\)1.25 cm.