Question

Explain the difference :
(a) Point sources and extended sources
of light.
(b) Umbra and penumbra.

please tell me fast
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Answer 1

Answer:

B) The region of complete shadow is called the umbra and the region of diffuse shadow is called the penumbra. These shadows are formed on the Earth during a solar eclipse and From the umbra we see a total eclipse while from the penumbra only a partial eclipse is visible.

sorry I don't konw the first one :(

Answer 2

Answer:

:

︎︎︎Point Source of Light

It is that source of light which forms only the umbra region on the screen of the shadowed object.

︎︎︎Extended Source of light

It is that source of light that forms umbra as well as the penumbra region on the screen of the shadowed object

︎︎︎ : the central part of a shadow where it is completely dark

︎︎︎ : the outer part of a shadow, that is less dark than the central part

Explanation:

:

︎︎︎Point Source of Light

It is that source of light which forms only the umbra region on the screen of the shadowed object.

︎︎︎Extended Source of light

It is that source of light that forms umbra as well as the penumbra region on the screen of the shadowed object

︎︎︎ : the central part of a shadow where it is completely dark

︎︎︎ : the outer part of a shadow, that is less dark than the central part