Question

The amount and intensity of insolation varies during the day, during the season and during the year.

Choose the factor which is mainly responsible for the above.

Options

• Rotation of earth on its axis.

• Angle of inclination of sun’s rays.

• Length of the day.

• All are equally responsible.

Answer 1

All are equally responsible.

Explanation:

The amount and intensity of insolation vary due to the Earth’s rotation (which causes day and night), the angle of inclination of the Sun’s rays (which changes the intensity), and the length of the day (which affects total insolation received). All these factors together cause variations daily, seasonally, and yearly.