and the ray changes from just refracting to total internal reflection, is called the critical angle. The diagram below shows the light refracting from glass into air. For light travelling from ...

The law of reflection states that: angle of incidence = angle of reflection For example, if a light ray hits a surface at 32°, it will be reflected at 32°.

All it is is a device that measures the angle between two objects. The sextant makes use of two mirrors. With this sextant, one of the mirrors ( mirror A in the diagram) is half-silvered ...