. A ray of light is incident at 30 degrees in air on an air-glass boundary. What angle does the ray make with the normal in glass?
EXTENDED SOLUTION
1. Draw a picture. A) Locate
the air-glass boundary. B) Locate the incident ray. C) Locate
Normal line (a line perpendicular to the refractive surface drawn
at the point of incidence)..
2. locate the angles in air and in glass
3. Solve using Snell's Law
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