Optics Question 881
Question: Assuming human pupil to have a radius of 0.25 cm and a comfortable viewing distance of 25 cm, the minimum separation between two objects that human eye can resolve at 500 nm wavelength is:
Options:
A) $ 100\mu m $
B) $ ~300\mu m $
C) $ 1\mu m $
D) $ ~30\mu m $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ \sin \theta =\frac{0.25}{25}=\frac{1}{100} $ .
Resolving power $ =\frac{1.22\lambda }{2\mu \sin \theta }=30\mu m $ .
