The solar radiation is measured by

A. Sextant

B. Pyrometer

C. Pyrheliometer

D. Albedometer

Answer: Option C

Solution(By Examveda Team)

Pyrheliometer is an instrument to measure a direct beam of solar radiation. Sunlight enters the instrument through a window and is directed onto a thermopile which converts heat to an electrical signal that can be recorded. It is used in meteorological and climate observations, material testing research and assessment of the efficiency of solar collectors.