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What wavelengths of the electromagnetic spectrum are utilized by plants for the purpose of photosynthesis?

Answer 1

Almost all of the visible spectrum.

Photosynthetically active radiation (PAR) is the range of light wavelengths between 400 and 700 nm that affects photosynthesis. Plants use light wavelengths outside of PAR for a process known as photomorphogenesis, which is the light-regulated changes in development, morphology, etc.

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Answer 2

Luca de

For photosynthesis, plants mainly use visible spectrum wavelengths, especially red (about 660 nm) and blue (about 430 nm).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.