A grating has 1000 lines/mm of width. How wide must the grating be in order to resolve the mode structure of a HeNe laser beam of wavelength 633 nm? The frequency difference between the modes is 450 MHz.
A grating has 1000 lines/mm of width. How wide must the grating be in order to resolve the mode structure of a HeNe laser beam of wavelength 633 nm? The frequency difference between the modes is 450 MHz.
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![A grating has 1000 lines/mm of width. How wide must the grating be in order to resolve the mode
structure of a HeNe laser beam of wavelength 633 nm? The frequency difference between the modes
is 450 MHz.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2f28b736-1408-4903-88b6-ddd9864a269a%2F7504de5b-e425-4287-931b-0bed1431e03a%2Fof32x7f_processed.jpeg&w=3840&q=75)
Transcribed Image Text:A grating has 1000 lines/mm of width. How wide must the grating be in order to resolve the mode
structure of a HeNe laser beam of wavelength 633 nm? The frequency difference between the modes
is 450 MHz.
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