Question

Mention four proofs which helped people accept the fact that the Earth is spherical.

Answer 1

1. Circumnavigation of the Earth: Voyagers traveling around the world returned to their starting point, which is only possible on a spherical Earth.
2. Sighting of a Ship: When a ship approaches from the sea, the mast is seen first, then the deck, funnel, and hull, indicating the Earth's curved surface.
3. Lunar Eclipse Shadow: The shadow of the Earth on the Moon during a lunar eclipse is always circular, suggesting a spherical shape.
4. Variations in Sunrise and Sunset Timings: These timings differ across the world, which would not happen if the Earth were flat.