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प्रश्न
Give reasons for the following statement :
The duration of day and night is equal everywhere on 21st March and 23rd September.
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उत्तर
These are two special positions in the revolutionary course of the Earth when days and nights are equal throughout the world. They are the two equinox, the first on March 21 st and the second on September, 23 rd. Because on these two days the mid-day sun is overhead at the equator, the positions of both the hemispheres are the same in respect of the sun.
संबंधित प्रश्न
Which temperature zone receives slanting rays?
What is meant by Equinox?
Mention one effect of seasons in low and high latitudes.
Give reasons for the following
The speed of the rotation of the earth is greater at the Equator than at the Arctic Circle.
Give reasons for the following:
25th of December in New Zealand may be one of the hottest days of the year.
On which dates does the sunshine vertically overhead at Equator?
Name the longest day in the Southern Hemisphere.
When does the summer solstice occur ?
Give reasons for the following:
Altitude of the Sun varies at a place according to seasons.
Give reasons for the following:
The variation in the lengths of day and night goes on increasing polewards.
