Question

When a shadow with only penumbra be formed ? Explain

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Answer 1

Answer:

refer to the attachment ☝

hope it helps you ⚡

Answer 2

Answer:

The penumbra is a half-shadow that occurs when a light source is only partly covered by an object—for example, when the Moon obscures part of the Sun's disk. The other 2 areas are: Umbra – the shadow's dark center portion. Antumbra – the lighter part of the shadow that begins where the umbra tapers to a point.