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Question

PAR is ___.

A
Photosensitizing active radiation
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B
Photosynthetically active radiation
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C
Photosynthetic absorption radiation
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D
None of these
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Solution

The correct option is B Photosynthetically active radiation
Photosynthetically active radiation, often abbreviated as PAR, designates the spectral range (wave band) of solar radiation from 400 to 700 nm that photosynthetic organisms like plants and some of the bacteria are able to use in the process of photosynthesis. This spectral region corresponds to visible light part of the electromagnetic spectrum.

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