Physics (AS & A Level) · May / June 2016 · Paper 11 · Question 26
A parallel beam of light of wavelength 450 nm is incident normally on a diffraction grating which has 300 lines / mm. What is the total number of intensity maxima observed?
- A7
- B8
- C14
- D15
As printed in the paper
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Correct answer: D. 15
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