A) 400-700 nm
B) 450-950 nm
C) 340-450-nm
D) 500-600 nm
Correct Answer: A
Solution :
[A] The cosmic rays, X-rays, UV-rays, the visible spectrum, infrared 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. |
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