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प्रश्न
Give reasons for the following
The period of twilight and dawn increases polewards.
उत्तर १
On account of the oblique path of the sun towards poles than the vertical path along the equator, the length of dawn and twilight is greater, as it is nearly one hour near the equator and 50 days at the poles.
उत्तर २
Latitudes go on increasing polewards. In the middle and high altitudes duration of sunlight is limited. Both twilight and dawn continue so long as the sun is 18° below
संबंधित प्रश्न
Who devised the lines of latitude and longitude?
Which temperature zone receives slanting rays?
What is meant by Equinox ? Give the dates of the two Equinoxes.
On which dates does the sunshine vertically overhead at
(a) Equator,
(b) Tropic of Cancer.
(c) Tropic of Capricorn?
When is the spring equinox?
Give reasons for the following statement :
The duration of day and night is equal everywhere on 21st March and 23rd September.
Give reasons for the following statement:
Beyond the tropics, the Sun is never overhead
Give reasons for the following :
Twilight is of longer duration in higher latitudes than at Equator.
Give reasons for the following:
The variation in the lengths of day and night goes on increasing polewards.
What is a Geoid?
