how is a shadow formed? Define terms 'umbra' and 'penumbra'.
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During an eclipse, two shadows are cast. The first is called the umbra (UM bruh). ... It is the dark center of the eclipse shadow. The second shadow is called the penumbra (pe NUM bruh). The penumbra gets larger as it goes away from the sun
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Answer:
Shadow produced due to an extended source of light : umbra and penumbra.
Umbra= the darkest part of the shadow formed is called the umbra.
Penumbra= the lighter part of the shadow formed is called the penumbra.
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