Question

The angle between the sun’s rays and a line perpendicular to the horizontal plane through angle the beam of the sun and vertical is called __________

(a) Solar Azimuth angle

(b) Zenith angle

(c) Altitude angle

(d) Declination

I got this question during a job interview.

My doubt stems from Solar Constant in chapter Solar Energy of Energy Engineering

Answer 1

The correct option is (b) Zenith angle

Easiest explanation: The angle between the sun’s rays and a line perpendicular to the horizontal plane through angle measured from the north to the horizontal projection of rays is called zenith angle. And it is denoted by θz.