JIPMER2007BotanyPhotosynthesis in Higher Plants
Photosynthetic Active Radiation (PAR) has the following range of wavelengths
Options
- A400-700 ~nm
- B450-950 ~nm
- C340 - 450 nm
- D500 - 600 nm
Correct answer
A. 400-700 ~nm
Step-by-step solution
The cosmic rays, X-rays, UV-rays, the visible spectrum, infra red rays, radio waves, coming from sun are constituted electromagnetic spectrum. The waves of each of these types have a characteristic range of wavelengths. The visible spectrum, which is also known as Photosynthetic Active Radiation (PAR), has a range of wavelength of 380 nm to 760 nm . This part of electromagnetic spectrum is responsible for photosynthesis.