Question

Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength 500 nm coming from a star.
(A) 457.5 × 10⁻⁹ radian
(B) 610 × 10⁻⁹ radian
(C)
305 × 10⁻⁹ radian (D) 152.5 × 10⁻⁹ radian

Answer 1

Explanation:

∆theta)/d=1.22×500×10^9/200×10^-2

=305×10^-9rad