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Question
Write few differences between umbra and penumbra.
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Solution
Umbra
Penumbra
(1) It is the darkest part of shadow.
(1) It is less dark part of shadow.
(2) No light reaches to this region.
(2) Light from some parts of the source reaches.
(3) It is central part of shadow.
(3) It is outer part of a shadow.
| Umbra | Penumbra |
| (1) It is the darkest part of shadow. | (1) It is less dark part of shadow. |
| (2) No light reaches to this region. | (2) Light from some parts of the source reaches. |
| (3) It is central part of shadow. | (3) It is outer part of a shadow. |
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