Q. 5. Answer the following.
(1) Why do the sun, the moon and the earth
not lie in one and the same line on every
full moon and new moon day?
(2) When total solar eclipse occurs why is
partial eclipse also seen from the earth ?
(3) Suggest measures that can be taken to
eradicate the superstitions related to the
eclipses.
(4) What precautions should we take while
observing a solar eclipse?
(5) What types of solar eclipses will occur in
perigee condition?
Answers
Explanation:
1) Because the Earth and Moon don't orbit in the same plane. The Earth is inclined in its orbit of the Sun, and the Moon is inclined in it's orbit of the Earth. ... When the Moon crosses this point while the two lines are close enough to parallel, we get eclipses.
2) However, some eclipses can only be seen as a partial eclipse, because the umbra passes above the Earth's polar regions and never intersects the Earth's surface. Partial eclipses are virtually unnoticeable in terms of the Sun's brightness, as it takes well over 90% coverage to notice any darkening at all.
3)?
4) Never look at the Sun directly without protective eye gear. Even sunglasses cannot protect your eyes from the damage the Sun's rays can do to them.
Always keep your back towards the Sun while looking at a pinhole projection.
Do not look at the Sun through the pinhole, binoculars or telescope.
5) As the moon is closest to the earth during perigee, it can block the sun fully and so total solar eclipse is possible. ... Annular solar eclipse is possible only when the moon is far away from the earth where it cannot fully block the sun. So, annular solar eclipse is not possible when the moon is at its perigee.