What factors are responsible for Insolation variation?

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The angle of inclination of the sun rays

The length of the day

The transparency of the atmosphere

All of these

answer is D.

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Detailed Solution

All the above-mentioned points are correct. Option 4 is the correct answer.
Various factors that affect insolation include the angle of inclination of the earth, revolution of earth, rotation of earth, configuration of land and altitude.
Atmospheric conditions as well as the season affect the actual amount of solar radiation at a particular location on Earth. Below are the factors that are responsible for solar radiation fluctuations:-
The angle of inclination of the sun's rays
The length of the day
Transparency of the atmosphere
Solar constant
Distance between the Earth and the Sun
So, 4 is the correct answer.

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