A pyrheliometer is an instrument used for measuring the_________________?
Correct answer: D. Beam radiation
- A. Bright sunshine period
- B. None of these
- C. Diffuse radiation
- D. Beam radiation
Explanation
A pyrheliometer is designed with a narrow field of view to measure direct solar radiation, also called beam or normal-incidence radiation. Diffuse radiation is measured using a pyranometer with the direct beam blocked.
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