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TS EAMCET · Physics · Electrostatics

What would be the angular separation between the consecutive bright fringes in Young's double slit experiment with blue green light of wavelength 400 nm? The separation between the slits is 0.001 m.

  1. A 4×10-4rad
  2. B 3×10-4rad
  3. C 2×10-4rad
  4. D 1×10-4rad
Verified Solution

Answer & Solution

Correct Answer

(A) 4×10-4rad

Step-by-step Solution

Detailed explanation

Given, in Young's double-slit experiment, the wavelength of light(λ)=500nmthe separation between slits(d)=1·0×10-3mIn the above figure,θ=angles fringe widthsinceθis a small angle, thereforeθ≃tanθ=yD=λDdD=λdθ=4×10-7m1·0×10-3m=4×10-4rad.
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