Question: In Figure two glass plates (n = 1.60) form a wedge, and a fluid (n = 1.50) fills the wedge-shaped space. At the left end

In Figure two glass plates (n = 1.60) form a wedge, and a fluid (n = 1.50) fills the wedge-shaped space. At the left end the plates touch; at the right, they are separated by 580 nm. Light with a wavelength (in air) of 580 nm shines downward on the assembly, and an observer intercepts light sent back upward. Does a dark or bright band lie at?

(a) The left end and

(b) The right end?

Incident light

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