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A thick plate of flint glass (n = 1.66) rests on top of a thick plate...

A thick plate of flint glass (n = 1.66) rests on top of a thick plate of transparent acrylic (n = 1.50). A beam of light is incident on the top surface of the flint glass at an angle at Θi (in air). The beam passes through the glass and the acrylic and emerges at an angle of 40.0° (in air again) with respect to the normal. Calculate the value of Θi. Draw a ray diagram for the light path through the two plates of refracting material

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