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In the diagra...

Question

In the diagram shown, what is the letter A and letter B pointing towards?

A

A-Umbra, B-Penumbra

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B

A-Penumbra, B-Umbra

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C

A-Umbra, B-Antumbra

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D

A-Penumbra, B-Antumbra

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Solution

The correct option is B A-Penumbra, B-Umbra
Umbra- This portion of shadow is completely dark as no light reaches from the source of light due to the opaque object.
Penumbra- This portion of shadow is not completely dark as only a small portion of source of light is covered by the opaque object.
The lighter part of shadow which forms at a larger distance from the object is called antumbra.

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