When the moon completely covers the sun, it is known as ?

(1) the Antumbra
(2) the Umbra
(3) the Penumbra
(4) None of these

Correct Answer : (2) At the time of Umbra, moon completely covers the sun.

Explanation :

A solar eclipse occurs when the moon crosses the path between the sun and the earth and at this time, moon completely covers the sun.

The darkest shadow (where the sun is completely covered) is called the umbra. It becomes smaller as it reaches the Earth. This is the dark center of the Moon’s shadow.

The umbra is narrow at the distance of the Earth, and a total eclipse is observable only within the narrow strip of land or sea over which the umbra passes. The partial shadow is called the penumbra.

See Also

Reference

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