Question

write the principle of formation of shadow​

Answer 1

Answer:

Formation of Shadows

To form a shadow a source of light is required. It is only when light rays are obstructed we get the shadow of the object. The size of the shadow keeps on changing with the position of the sun. Shadows are always formed on the opposite side.

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Answer 2

Answer:

shadow of a subject falling on the surface of another subject because the former subject has blocked the light source.The umbra is created because the direct light has been completely blocked, while the penumbra is created by something partly blocking the direct light.