Eclipses
Eclipses
The Sun can cast the shadow of the Earth and Moon. This happens when the sun, moon and earth align in a straight line. When the shadow of the Earth falls on the Moon, we cannot see the Moon and this is called lunar eclipse. If the shadow of Moon falls on the Earth, we cannot see the Sun and this is Solar Eclipse.These are examples of shadow formation by heavenly bodies. Let us understand how this happens.
Solar Eclipse:
When the sun, moon and earth are in a straight line, the moon very briefly blocks the light of the sun from reaching earth. In other words, the moon casts its shadow on the earth. On a new Moon day The Moon lies between the Sun and the Earth. On such a day, if they come in a straight line then the shadow of moon falls on the Earth, this phenomenon is known as solar eclipse. Thus, a solar eclipse always occurs on a new moon day.
In the Figure below In the region where the sun will be blocked totally at these places, and a total solar eclipse can be seen. In the rest of the region where the sun will be partially blocked by the moon and a partial solar eclipse can be seen.
Lunar Eclipse:
When the sun, the earth and the moon come in a straight line, with the earth in the middle, the shadow of the earth falls on the moon. On a full Moon night The Sun and Moon are on the opposite side of the Earth. On such a day if they come in a straight line then part or whole of the Moon is not visible to us for some time from some parts of the Earth. This is the case of Lunar Eclipse.
When the Moon is not visible partially, it is called partial lunar eclipse. When the Moon is not visible completely from the Earth we call it a total lunar eclipse. Lunar eclipse always occurs on a full moon night.
Lunar Eclipse occurs when __________________ | |||
| Right Option : B | |||
| View Explanation | |||
What is Solar Eclipse? | |||
| Right Option : A | |||
| View Explanation | |||
Which of the following are correct ? (a) The Sun can cast the shadow of the Earth and Moon. (b) The Sun can cast the shadow when the sun, moon and earth align in a straight line. (c) When the shadow of the Earth falls on the Moon, we cannot see the Moon and this is called lunar eclipse . | |||
| Right Option : D | |||
| View Explanation | |||
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