describe a simple experiment to show that light travels in a straight line
Answers
As you asked for a simple experiment...
Light travels in straight lines
Once light has been produced, it will keep travelling in a straight line until it hits something else.
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. Shadows don’t appear totally dark because there is still some light reaching the surface that has been reflected off other objects.
Once light has hit another surface or particles, it is then absorbed, reflected (bounces off), scattered (bounces off in all directions), refracted (direction and speed changes) or transmitted (passes straight through).
Answer:
light a candle and fix it at one end of the table see the light of the flame through a straight pipe. it is visible . bend the pipe a little and again try to see the light of the flame through it. it is not visible . this shows that light travels along a straight line.