When a ray of light is incident at normal incidence, (at right angles), to the surface between two optical materials, the ray travels in a straight line. When the ray is incident at any other ...

In this required practical activity, it is important to: make, measure and record the angles of incidence accurately using a protractor; observe and use a protractor to measure angles of refraction.

The transmission edge of a long-pass filter shifts to shorter wavelengths at flatter angles of incidence. As shown in the figure, there is an angle of incidence for a monochromatic laser beam at which ...