Photosynthetically Active Radiation (PAR) is the amount of light available for photosynthesis, which is light in the 400 to 700 nanometer wavelength range.
NEET UG 2005 — Botany Photosynthesis in Higher Plants
Photosynthetic active radiation (PAR) has the following range of wavelengths:
Held on 30 Apr 2005 · Verified 9 Jul 2026.
340−450 nm
400-700 nm
500−600 nm
450−950 nm.
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