Question

5. Why are days and nights equal all over the world on 21st March and 23rd September? ​

Answer 1

Answer:

On 21st March and September 23rd, direct rays of the sun fall on the equator. At this position, neither of the poles is tilted towards the sun; so, the whole earth experiences equal days and equal nights.

Explanation:

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Answer 2

Answer:

On 21 March and 23 September, the Sun shines vertically on the Equator; therefore, all places on the Earth experience equal days and equal nights.

Explanation: