A diffraction grating with 610 lines per mm is illuminated with light of wavelength 520 nm. A very wide viewing screen is 2.0 m behind the grating.What is the distance between the two m\;=\;1 fringes? answer in m. How many bright fringes can be seen on the screen?

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Bunny GreenfelderLv2

22 Oct 2019

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