lunareclipse can only occur at the phase of full moon.
when the earth bliocks sunlight it produces a shadow with two regions the umbra and th penumbra.
the earth's shadow will covr the moon's surface and causes a lunar ecilpse.
lunar eclipse can be observed with the nake eye.
it can only be observed by people on the side of the earth which is having night-time.
when the earth is brtween the sun and the moon and the three o them lie in a straight line sunlight cannot pass through the earth because it is an opaque object.
as sunlight travels in straihht lines it cannot bend around the earth.
therefore the earth blocks the sunlight from reaching the moon.
lunar eclipse occurs when the earth is between the sun and the moon and the three of them lie in a staight line.thabove diagram shows the positios of th moon earth and sun during the eclipse of the moon