Question

when sun rays fall only a part of moon, then it is called?

Answer 1

Lunar Eclipses .A lunar eclipse occurs when the Moon passes directly behind the Earth into its umbra (shadow)

Answer 2

Hi friend,

The half of moon's surface is always illuminated by sun light. However , just how much of that light we can see from our point of view on Earth varies everyday and this is what we refer to as a moon phase.....i hope it helps you