Question

A light of wavelength 5000 Å is coming from a
distant star. The limit of resolution of a telescope
whose objective has a diameter of 100 cm is
(1) 3 x 10-7 radian (2) 6 x 10-7 radian
(3) 5 x 10-7 radian (4) 2 x 10-7 radian​

Answer 1

Answer:

Explanation:

Given wavelength of light = 5000 A, = 5 x 10-7 m,  

Diameter of the objective = 5.08 m.  

Limit of resolution: Δθ = 1.22λ/2a  

= (1.22 x 5 x 10-7m / 5.08) = 1.2 x 10-7 radians.