You shine your laser pointer through the flat glass side
Chapter 18, Problem 45GP(choose chapter or problem)
Problem 45GP
You shine your laser pointer through the flat glass side of a rectangular aquarium at an angle of incidence of 45°. The index of refraction of this type of glass is 1.55.
a. At what angle from the normal does the beam from the laser pointer enter the water inside the aquarium?
b. Does your answer to part a depend on the index of refraction of the glass?
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