Question

Photosynthetically active radiation is represented
by the range of wavelength of
(a) 340 – 450 nm (b) 400 – 700 nm
(c) 500 – 600 nm (d) 400 – 950 nm

Answer 1

Answer:

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Answer 2

The required "option (b) 400 – 700 nm" is correct.

Explanation:

The photosynthetically active radiation(PAR) designates the spectral range (wave band) of solar radiation from 400 to 700 nm (nano meters). The photosynthetic organisms are able to use in the process of photosynthesis. This spectral region corresponds to more or less with the range of light visible to the human eye.

Thus, the required option (b) 400 – 700 nm is correct.