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प्रश्न
Describe the two interesting phenomena made by the circle of illumination viz., Solstice and Equinox.
उत्तर
The circle of illumination is the lighted part of the earth by the sun. On June 21, Northern Hemisphere enjoys the longest day due to the sun’s position overhead at the Tropic of Cancer. It is called the Summer Solstice. On the other hand, when the sun is overhead on the Tropic of Capricorn, the Southern Hemisphere gets the longest day on December 22, which is known as Winter Solstice. The dates of Equinox are 21st March and 23rd September when the days and nights are equal all over the world and there are spring and autumn seasons in Northern Hemisphere and autumn and spring in Southern Hemisphere respectively.
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संबंधित प्रश्न
Who devised the lines of latitude and longitude?
Name the thermal zones of the earth.
Which temperature zone receives almost vertical rays of the sun and which zones receive slanting rays?
Give reasons for the following
The length of day and night is not equal at all places on the earth.
Give reasons for the following
The period of twilight and dawn increases polewards.
With the help of a diagram describe the heat zones.
Give reasons for the following Statement :
The areas, lying on the Equator, have their duration of day-light almost constant throughout the year.
Give reasons for the following statement:
The regions, near North Pole and South Pole, have six months of continuous day-light and darkness.
Give reasons for the following:
The variation in the lengths of day and night goes on increasing polewards.
Why are days and nights equal throughout the world on 21st March and 23rd September?
