Q. At which latitude, heat gain through insolation approximately equals heat loss through terrestrial radiation ?
A) 66° North and South
B) 22(1/2)° North and South
C) 40° North and South
D) 42(1/2)° North and South
Explanation
[Solution from source] Between the equator and about 40° latitude, incoming solar energy is more than outgoing radiation (a surplus). Poleward of about 40°, outgoing radiation is greater (a deficit). The two balance near 40° N and S. 66° marks the polar circles and 22½° is near the tropics; neither is the balance line. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.