question_answer 12)

  Which range of wavelength (in nm) is called Photosynthetically Active Radiation (PAR)? (a) 100-390                          (b) 390-430                         (c) 400-700                          (d) 760-100,00

Answer:

                  (c) Photosynthetically Active Radiation (PAR) ranges from 400-700 nm. This is the visible range of light energy. The range of other wavelength are associatic with        100-300 nm    : Ultraviolet (UV) range 390-430 nm    : Infrared (NIR) range 760-100,00 nm : Mid Infrared (MIR) range