What percentage of incident solar radiation is photosynthetically active radiation (PAR)?

What percentage of incident solar radiation is photosynthetically active radiation (PAR)?
  1. 50%
  2. 60%
  3. 70%
  4. 80%

Solution

Of the incident solar radiation, less than 50% is photosynthetically active radiation (PAR) that is used by autotrophs.

Asked in: NCERT

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