Question

The apparent movement of the Sun is overhead the Equator twice a year on
a. Dec 22 and Mar21
b. Mar21 and Sep23
c. Jun 21 and Dec 22
d. Sep 23 and Dec22

Answer 1

The Sun’s apparent movement across the sky passes directly overhead the Equator twice a year on about March 21, and another one on about September 23 at the time of the equinoxes.

However, the exact date cannot be given as the calendar is not synchronized to the sun and varies depending on the cycle of leap years.

 The rays of the Sun overhead at the Equator are perpendicular to the surface of the earth on these dates.