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Question
Light of wavelength of 5000 Å produces diffraction pattern of the single slit of width 2.5 μm. What is the maximum order of diffraction possible?
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Solution
Given: λ = 5000 × 10-10 m, d = 2.5 × 10-6 m, N = ?
d sin θ = N n λ
λ = `"d"/"N"`
N = `"d"/lambda`
`= (2.5 xx 10^-6)/(5000 xx 10^-10)`
`= 2.5/(1/2)`
= 5
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