Question

Photosynthetic Active Radiation (PAR) has which of the following range of wavelengths?

• A. 400-700 nm
• B. 450-920 nm
• C. 340-450 nm
• D. 500-600 nm

Answer 1

The correct option is A 400-700 nm

The photosynthesis process is essentially a light dependent synthetic process, which results in synthesis of sugars. A small part of the solar spectrum in the visible portion is used in the process of photosynthesis. This small portion of the solar spectrum is called photosynthetically active radiations or PAR. The wavelength of light active in PAR occur between 400 to 700 nm.