Optics

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in young’s double-slit experiment is

  1. infinite
  2. five
  3. three
  4. zero

Answer

nλ = d sinθ

2nλ = 2d.sinθ

2d = 2λ given

2nλ = 2λ . sinθ

sin θ = n (n = 0, 1, 2, .... ∝)

The correct option is A.