Question: A diffraction grating with 6 0 0 lines / mm is illuminated with light of wavelength 5 4 0 nm . A very wide viewing

A diffraction grating with 600 lines/mm is illuminated with light of wavelength 540 nm. A very wide viewing screen is 1.80 m behind the grating. a) What is the distance between the two m =1 bright fringes? b) How many bright fringes can be seen on the screen?

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