Physics (AS & A Level) · Oct / Nov 2019 · Paper 11 · Question 29
Monochromatic light of frequency f is incident on a diffraction grating of line spacing d. The speed of light is c. Which expression can be used to determine the highest order of intensity maximum produced by the grating?
- An = cf/d
- Bn = c/(df)
- Cn = f/(dc)
- Dn = df/c
As printed in the paper
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Correct answer: B. n = c/(df)
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