Q. Explain a shadow along with its parts. Mention any three important characteristics of
shadow.
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The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object.A shadow is formed when an opaque object comes in the path of light and stops it. An object forms shadow on the opposite side to the source of light. The shadows of objects are usually similar in outline to the object and hence we can identify the object from their shadows.
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