Question

Why is the shadow of earth concave on moon while a week before new moon?

Answer 1

Answer:

Explanation:

It doesn’t.

The Earth’s shadow as seen projected onto the Moon during a lunar eclipse is quite distinctly convex, and circular.

The dark part of the Moon at all other times, which has a concave boundary during gibbous phases, is not the shadow of the Earth; it is the Moon’s own shadow, the shadow cast on the Moon’s dark hemisphere by the light hemisphere by virtue of the fact that the Moon itself is not transparent.

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