Question

During a Lunar eclipse what is the penumbra
It is part of earth's shadow where the sun is completely blocked
It is the part of the moon's shadow where the sun is only partially blocked

Answer 1

During a lunar eclipse, the penumbra refers to the part of Earth's shadow where the Sun is only partially blocked. When the Moon passes through this region, it experiences a subtle shading rather than a complete obscuration of sunlight. This results in a subtle dimming of the Moon's surface rather than a dramatic darkening, which occurs in the umbra, the region where the Sun is completely blocked.