Question

A double-slit experiment is performed with light from a Helium Neon Laser on two slits
80 micrometers apart. The first bright interference fringe left of the center is spaced 2m from the bright center.
How far away from the double slit is the screen? wavelength =632nm
What will the fringe spacing be on the same screen if the light is changed to a wavelength of 532nm? Show your work!

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