Physics
State two differences between an umbra and a penumbra.
Light Energy
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Answer
| Umbra | Penumbra | |
|---|---|---|
| (i) | It is the portion of shadow where no light reaches from the source of light due to the opaque object. | It is the portion of shadow where a portion of light from the source of light reaches the shadow even in the presence of the opaque object in between them. |
| (ii) | It is completely dark. | It is not completely dark, but is dim (or less bright). |
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