In a diffraction pattern due to a single slit of width a the first minimum is observed at an angle 30 o when light of wavelength 5000 Å is incident on the slit. The first secondary maximum is observed at an angle of:

Question

In a diffraction pattern due to a single slit of width a the first minimum is observed at an angle 30 o when light of wavelength 5000 Å is incident on the slit. The first secondary maximum is observed at an angle of:, sin - 1 ⁡ 1 4, sin - 1 ⁡ 2 3, sin - 1 ⁡ 1 2, sin - 1 ⁡ 3 4

MARKS App · Accepted Answer

a sin ⁡ 30 = λ a sin ⁡ θ = 3 λ 2 sin ⁡ θ sin ⁡ 30 = 3 2 sin ⁡ θ = 3 2 × 1 2 sin ⁡ θ = 3 4 θ = sin ⁡ 3 4

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