A spectrophotometer recorded the absorbance of a chlorophyll a extract across visible wavelengths. The graph below shows the absorption spectrum.
Which wavelengths are reflected (not absorbed) by chlorophyll a, giving plants their color?
- A
Around 670 nm (red)
- Bcheck_circle
Around 550 nm (green)
- C
Around 425 nm (blue-violet)
- D
Both 425 and 670 nm
Explanation
Chlorophyll a absorbs strongly in blue (<del>425) and red (</del>670) and absorbs least at green wavelengths (~550), which are reflected and reach our eyes.