Question

Select the correct answer using the code given below:

Which of these factors are responsible for variation in Insolation?

(a) The angle of inclination of the suns rays
(b) The length of the day
(c) The transparency of the atmosphere.

• A. 1 only
• B. 1 and 2 only
• C. 1 and 2,3
• D. none of these

Answer 1

The correct option is C 1 and 2,3

Factors responsible for variation in insolation during a day, season and a year:

1. Rotation of Earth
2. The angle of inclination of Sun’s rays.
3. Length of day
4. Transparency of atmosphere
5. Configuration of land in terms of its aspect.

Earth’s axis has a 66.5 degrees angle with the plane of orbit around the sun leads to variation in insolation at different latitudes.

Area covered by slant rays is more than vertical rays. Energy gets distributed and net energy received per unit area decreases. The slant rays of Solar radiation are absorbed, scattered & diffused more in the deep atmosphere.