Botany - Photosynthesis in Higher Plants Question with Solution | TestHub

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