The Sun's rays fall vertically between Tropic of Cancer and Tropic of Capricorn. Why?

Tropic of Cancer is the most northern latitude on the Earth where the sun can appear directly overhead. The Tropic of Cancer is positioned at 23.5 degrees north of the equator.

Tropic of Capricorn is the most southern latitude on the Earth where the sun can appear directly overhead. The Tropic of Capricorn is positioned at 23.5 degrees south of the equator.

When the Northern Hemisphere tilt towards sun then the sun’s rays fall vertically on Tropic of Cancer and when the Southern Hemisphere tilt towards sun then the sun’s rays fall vertically on Tropic of Capricorn.

This is the reason for sun rays vertically between Tropic of Cancer and Tropic of Capricorn.