why some shadow are sharper some other diffused
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The blurry edges of everyday shadows are caused by the light sources being extended objects. Light from different parts of the source are able to travel into the shadow area because they emanate from different points in space. ... The lighter, outer part of the shadow, where some light can reach is called the "penumbra"
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hij they r so many named shadows like Penumbra shadow on portion that visable outside the entire shadow ...
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thank u
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