A bulb is kept burning just right above the following solids. Name the shape of the shadows obtained in each case. Attempt to give a rough sketch of the shadow. (You may try to experiment first and then answer these questions).
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Solution
(a) The shape of the shadow of the ball will be a circle.
(b) The shape of the shadow of the circular pipe will be a rectangle.
(c) The shape of the shadow of a book will be a rectangle.