The energy of wavelengths that appear ________ is LEAST useful to photosynthesis.greenredorangeblue
Question
The energy of wavelengths that appear ______ is LEAST useful to photosynthesis.
green
red
orange
blue
Solution
The energy of wavelengths that appear red is LEAST useful to photosynthesis.
Photosynthesis primarily utilizes light energy from the visible spectrum, particularly in the blue (around 430–450 nm) and red (around 640–680 nm) wavelengths. While red light is absorbed effectively by chlorophyll pigments, it is in the green wavelengths (around 500–550 nm) that plants reflect most of the light. As a result, the green light is not as effective for photosynthesis compared to blue or red light. Thus, among the provided options, red light has the least impact, making it less useful for the process of photosynthesis, even though it is absorbed.
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