This physics video tutorial explains how to solve diffracting grating problems. It explains how to calculate the second order angle given the wavelength of light used in nm and the number of lines per centimeter of the diffraction grating. It explains how to calculate the wavelength of light given the angle of the third order bright fringe. Finally, it explains how to calculate the number of lines per centimeter of a diffracting grating given the wavelength of light and the angle of the second order bright fringe. This video contains plenty of examples and practice problems on diffraction grating.

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