Wavelength of blue light that is absorbed maximally by pigments:
Correct answer: C. 430 nm
- A. 670 nm
- B. 540 nm
- C. 430 nm
- D. 750 nm
Explanation
In the visible light spectrum, chlorophyll pigments in plants absorb light most effectively in the blue (around 430 nm) and red (around 670 nm) regions. The correct answer is 430 nm, as this is the peak absorption for blue light by chlorophyll. Other wavelengths, such as 670 nm, represent red light absorption, and 540 nm represents green light, which is typically reflected rather than absorbed. 750 nm is near-infrared and not relevant to the absorption of blue light.
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