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Two flat glass plates are in contact along one end and are separated by a sheet of paper 3.0 *10 - 6 m thick at the other end. The top plate is illuminated by a monochromatic light source of wavelength 490 nm. How many dark parallel bands will be evident across the top plate? (1 nm = 10 - 9 m) Note that a dark band occurs where the plates contact.
U.S. Mint
A bureau of the Department of the Treasury responsible for producing coinage for the United States.
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