Q. Photosynthetic Active Radiation (PAR) has the following range of wavelengths :
A) 400 - 700 nm
B) 450 - 950 nm
C) 340 - 450 nm
D) 500 - 600 nm
Explanation
[Solution from source] NCERT gives PAR as light from 400 to 700 nm, the visible band that chlorophylls and carotenoids absorb. Wavelengths beyond 700 nm (far-red, infrared) and in the ultraviolet are not used for photosynthesis. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.