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Explain what is meant by umbra and penumbra with the

help of diagrams.

MSCERT Class 7 General Science Ch 3 Propagation of Light


Umbra and Penumbra are two parts of a shadow.The Umbra is the central cone shaped core of darkness that tappers mostly.The Penumbra is the outermost cone shaped part which diverges generally.An observer in penumbra experiences partial eclipse while a person in umbra experiences full eclipse.
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