Photosynthetically active radiation (PAR) represents the following range of wavelength

Options

A. 200 nm - 800 nm
B. 400 nm - 700 nm
C. 350 nm - 550 nm
D. 600 nm - 100 nm

Answer

B

Explanation

Light is the visible part of electromagnetic radiations, Sunlight or solar radiations reaching the earth have wavelength between 300 nm to 2600 nm. Part of the spectrum used in photosynthesis has a wavelength between 400-700 nm. It is called photosynthetically active radiations (PAR).