Optics Question 454

Question: A telescope of diameter 2 m uses light of wavelength 5000 A for viewing stars. The minimum angular separation between two stars whose image is just resolved by this telescope is

Options:

A) 4×104 rad

B) 0.25×106 rad

C) 0.31×106 rad

D) 5.0×103 rad

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Minimum angular separation Δθ=1R.P=1.22λd

=1.22×5000×10102=0.3×106rad



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