In the figure, a broad beam of light of wavelength 684 nm is sent directly downward through the top plate of a pair of glass plates. The plates are 120 mm long, touch at the left end, and are separated by 64 µm at the right end. The air between the plates acts as a thin film. How many bright fringes will be seen by an observer looking down through the top plate?
In the figure, a broad beam of light of wavelength 684 nm is sent directly downward through the top plate of a pair of glass plates. The plates are 120 mm long, touch at the left end, and are separated by 64 µm at the right end. The air between the plates acts as a thin film. How many bright fringes will be seen by an observer looking down through the top plate?
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Transcribed Image Text:In the figure, a broad beam of light of wavelength
684 nm is sent directly downward through the top
plate of a pair of glass plates. The plates are 120
mm long, touch at the left end, and are separated
by 64 um at the right end. The air between the
plates acts as a thin film. How many bright fringes
will be seen by an observer looking down through
the top plate?
Incident light
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