Visible light used in photosynthesis ranges from:__________?
Correct answer: C. 380 - 750 nm in wavelength
- A. 300 - 700 nm in wavelength
- B. 350 - 750 nm in wavelength
- C. 380 - 750 nm in wavelength
- D. 390 - 790 nm in wavelength.
Explanation
The photosynthetically useful part of visible light is commonly given as approximately 380 to 750 nm, covering the wavelengths absorbed by photosynthetic pigments. Students may choose 300 to 700 nm because it resembles a broad visible-light range, but 300 nm is ultraviolet and excludes part of the useful red region.
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