Chapter 12
Fig. 12.4: A beam of light fr om a light sour ce is made to fall on a mirr or. The reflected light is falling on the wall. Can sound make a light spot dance? Take a tin-can. Remove both ends to make it a hollow cylinder . Take a balloon and str etch it over the can, then wrap a rubber band ar ound the balloon. T ake a small piece of mirr or. Use
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