Wave Optics
- A parallel beam of monochromatic light of wavelength 5000 Å is incident normally on a single narrow slit of width 0.001 mm. The light is focused by a convex lens on a screen placed in focal plane. The first minimum will be formed for the angle of diffraction equal to
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For first minimum, a sin θ = nλ = 1λ
sinθ = λ = 5000 × 10-10 = 0.5 a 0.001 × 10-3
θ = 30°Correct Option: C
For first minimum, a sin θ = nλ = 1λ
sinθ = λ = 5000 × 10-10 = 0.5 a 0.001 × 10-3
θ = 30°
