Photosynthetically Active Radiation (PAR) is the amount of light available for photosynthesis, which is light in the 400 to 700 nm wavelength range.
NEET UG 2004 — Botany Photosynthesis in Higher Plants
Photosynthetically active radiation (PAR) represents the following range of wavelength:
Held on 30 Apr 2004 · Verified 9 Jul 2026.
500−600 nm
450−950 nm
340−450 tun
400−700 nm.
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