March 21 to June 21
June 21 to September 21
September 21 to December 21
Both (A) and (B) of above
Answer is Right!
Answer is Wrong!
The correct answer is: D. Both (A) and (B) of above.
The sun’s declination is the angle between the sun’s rays and the Earth’s equator. It is positive when the sun is north of the equator and negative when it is south of the equator. The sun’s declination changes throughout the year as the Earth orbits the sun.
On March 21, the sun crosses the equator from south to north. This is the vernal equinox, and it marks the beginning of
spring in the Northern Hemisphere. The sun’s declination then increases until it reaches its maximum value of 23.5 degrees north on June 21, the summer solstice. After the summer solstice, the sun’s declination decreases until it reaches its minimum value of -23.5 degrees south on December 21, the winter solstice. The sun’s declination then increases again until it reaches the vernal equinox again on March 21.Therefore, the sun’s declination remains north between March 21 and June 21 and between September 21 and December 21.