Only umbra is seen when the light
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Explanation:
scattering of light emerging from a point source does not take place this only Dark Shadow of the object placed in front of the point source is obtained hence we do not find penumbra
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The umbra, penumbra and antumbra are three distinct parts of a shadow, created by any light source after impinging on an opaque object. Assuming no diffraction, for a collimated beam (such as a point source) of light, only the umbra is cast.
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