Exam-style question
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What is the formula used to calculate the angle of diffraction in a diffraction grating?.
- A.d sin(θ) = nλ
- B.nλ = d tan(θ)
- C.λ = d / n
- D.θ = n / d
Model answer
What a good answer should say
- d sin(θ) = nλ
Explanation
Why this works
The correct formula for calculating the angle of diffraction in a diffraction grating is d sin(θ) = nλ, where d is the distance between grating lines, θ is the angle of diffraction, n is the order of the maximum, and λ is the wavelength of the light. This relationship is fundamental in analyzing spectra produced by diffraction gratings.
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