Question

On 21 march rays of the sun fall directly on the ____​

Answer 1

Answer:

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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. This is called an equinox.

Answer 2

Answer:

The rays of the sun can reach only half of the earth surface at one time. The sun rays extend to the north and south pole equally only twice during the year, on September 23 and March 21. On these two days vertical rays of the sun fall directly on the equator