Physics, 19.05.2021 19:00 amanuelwold

Light enters a solid tube made of plastic having an index of refraction of 1.60. The light travels parallel to the upper part of the tube. You want to cut the face AB so that all the light will reflect back onto the tube after it first strikes that face. (a) what is the largest that Theta can be if the tube is in air?
(b) if the tube is immersed in water of refractive index 1.33, what is the largest that Theta can be?

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Light enters a solid tube made of plastic having an index of refraction of 1.60. The light travels p...