The instrument used for measuring the photosynthetically active radiations (PAR) is:________?
Correct answer: A. Quantom sensor
- A. Quantom sensor
- B. Pyrgeometer
- C. Pyrheliometer
- D. Both A & C
Explanation
A quantum sensor measures photosynthetically active radiation, usually expressed as photosynthetic photon flux in the 400–700 nm range. Pyrheliometers measure direct solar irradiance, while pyrgeometers measure long-wave radiation.
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