Question

A parallel beam of light (λ = 5000 Å) is incident normally on a narrow slit of width 0.2 mm. The angular separation between the first two minima is 

(A) 2.5 × 10^-3 degree 

(B) 2.5 × 10^-3 rad 

(C) 5 × 10^-3 degree 

(D) 5 × 10^-3 rad.

Answer 1

(B) 2.5 × 10^-3 rad