Question

4.
proved that the Earth spins on its own axis.​

Answer 1

Answer:

By the mid 19th century, most educated people knew that Earth spins on its axis, completing a rotation once a day, but there was no obvious visual demonstration of the Earth's rotation, only astronomical evidence.

Answer 2

Answer:

Acting on a hunch, Léon Foucault had determined that he could use a pendulum to illustrate the effect of the Earth’s movement. He called together a group of scientists, enticing them with a note declaring, “You are invited to see the Earth turn.” Foucault hung a pendulum from the ceiling of the Meridian Room of the Paris Observatory. As it swept through the air, it traced a pattern that effectively proved the world was spinning about an axis.