Question

Total ecplise of the sun occurs when​

Answer 1

when the moon gets between Earth and the sun, and the moon casts a shadow over Earth.

Answer 2

A total eclipse occurs when the dark silhouette of the Moon completely obscures the intensely bright light of the Sun, allowing the much fainter solar corona to be visible. During any one eclipse, totality occurs at best only in a narrow track on the surface of Earth.