Why is the difference between the durations of day and night hardly felt at Kanyakumari but not so in Kashmir?
These places do not have the same duration of day and night. The circle of illumination divides the Equator into two equal parts. The days and nights are, therefore, of the same duration at the equator. As Kanyakumari is quite near the equator, the day-night difference is hardly one hour there. But as we move away from the equator towards the poles, the variations in the duration of day and night becomes greater. It is because of the unequal division of the parallels of latitude by the circle of illumination. Kashmir is over 30° away from the equator and so the difference in duration of day and night is over four hours there.