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Question

Wavelength of visible light, which is required for photosynthesis is

A
200 -400 nm.
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B
390 -780 nm.
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C
700 -900 nm.
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D
100 -200 nm.
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Solution

The correct option is B 390 -780 nm.
  • A very small part of the electromagnetic spectrum can be seen by the human eye i.e., between the wavelengths 390 and 780 nm.
  • This part of the electromagnetic spectrum is called a visible light spectrum.
  • Within the spectrum the longer the wavelength of the radiation, the slower the vibration of the photons and the less energy each photon contains.
    Hence, correct option is B.

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