Question

A light source, which emits two wavelengths λ₁ = 400 nm and λ₂ = 600 nm, is used in a Young’s double slit experiment. If recorded fringe widths for λ₁ and λ₂ are λ₁ and λ₂ and the number of fringes for them within a distance y on one side of the central maximum are m₁ and m₂, respectively, then 

(A) β₂ > β₁ 

(B) m₁ > m₂ 

(C) From the central maximum, 3^rd maximum of λ₂ overlaps with 5^th minimum of λ₁ 

(D) The angular separation of fringes for λ₁ is greater than λ₂

Answer 1

(A) β₂ > β₁ 

(B) m₁ > m₂ 

(C) From the central maximum, 3^rd maximum of λ₂ overlaps with 5^th minimum of λ₁