Question

demonstrate that light moves a straight line?​

Answer 1

Explanation:

Two experiments are used to demonstrate how light travels in straight lines. In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards. When she arranges the holes in a straight line, the light can travel through

Answer 2

                                Light.

Shadows are evidence of light travelling in straight lines. An object blocks light so that it can’t reach the surface where we see the shadow. Light fills up all of the space before it hits the object, but the whole region between the object and the surface is in shadow.

This experiment shows that light travels in a straight line in the air. But it also bounces off of a reflective surface, like a mirror.