Question

differentiate between umbra and penumbra

Answer 1

Originally Answered: What is the difference between the penumbra and umbra? ... Theumbra is a central cone of darkness which tapers away from the Earth or Moon, whilst the penumbra is an outer cone of partial shadow which diverges instead of tapering. The Moon's shadow cast on the Earth appears as a solar eclipse.

Answer 2

Answer

There are two parts to these shadows. The umbra is a central cone of darkness which tapers away from the Earth or Moon, whilst the penumbra is an outer cone of partial shadow which diverges instead of tapering. The Moon's shadow cast on the Earth appears as a solar eclipse.
Shadows form when light shines upon an object. ... For example, a lunar eclipse occurs only when the moon is full and when it passes through part of the Earth's shadow. Physicists describe shadow volume in terms of umbra and penumbra.


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