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A vertically polarized laser beam (wavelength 400 nm) passes through a polarizer (60° from vertical) and two slits that are 0.1 mm apart.

A vertically polarized laser beam (wavelength 400 nm) passes through a polarizer (60° from vertical) and two slits that are 0.1 mm apart. Each slit is 800 nm wide. The light hits a screen 1 m away.
a. What is the frequency of the laser light?
b. What fraction of light intensity is transmitted through the polarizer?
c. At what angle does the second-order maximum occur?
d. One slit is blocked. What is the width of the central maximum on the screen?

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