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 ...

A ray diagram shows how light travels, including what happens when it reaches a surface. In a ray diagram, you draw each ray as: a straight line; with an arrowhead pointing in the direction that ...

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 ...