Why does sound make a light spot dance - Science - Sound

Question

Why does sound make a light spot dance ?

Jesany Joroj · Accepted Answer

The vibrations made by the sound waves deflect the way
of the ray of light and make the light spot dance Here, try this
activity to prove that sound can make light spot
dance:

Materials Required:-

Small tin can,Balloon,Rubber
Bands,Mirror,Glue,Wall Procedure:-(1) Take a tin can and remove the
both ends to make it a hollow cylinder (2) Take a balloon and
stretch it over the can,then wrap a rubber band around the balloon
(3)Take a piece of mirror to the balloon (4)After reflection,the
light spot is seen on the wall (5)Talk or shout directly into the
open end of the can (6)Observe the dancing light spot on the wall
Result:-(1) This experiment proves that the sound can make a light
spot dance