gs1easy
Variations in the length of daytime and night-time from season to season are due to
- A.the earth’s rotation on its axis
- B.the earth’s revolution around the sun in an elliptical manner
- C.latitudinal position of the place
- D.revolution of the earth on a tilted axis
▶ Answer & Explanation
Correct answer: D. revolution of the earth on a tilted axis
The Earth's axis is tilted at approximately 23.5 degrees relative to its orbital plane. As the Earth revolves around the Sun, this tilt causes different hemispheres to receive more direct sunlight at different times of the year. This differential heating leads to variations in day length, with longer days and shorter nights in the hemisphere tilted towards the Sun, and vice versa.
Source: UPSC gs1 2013