Correct option is C
Green light is the most effective for photosynthesis because plants use light in a specific spectrum for this process. Although green light is reflected by plants, a portion of it is absorbed and utilized for photosynthesis. Chlorophyll, the key pigment involved in photosynthesis, absorbs most of the light in the red and blue parts of the spectrum, but it does absorb some green light, too. While plants appear green due to the reflection of green light, this light can still be used in photosynthesis.
Information Booster: Chlorophyll, the primary pigment in plants, absorbs light most efficiently in the blue (430–450 nm) and red (640–680 nm) ranges of the spectrum. The reason plants appear green is because green light (500–570 nm) is not absorbed but reflected. However, despite its reflection, green light can still be absorbed to some degree, particularly by other pigments in the chloroplasts, such as carotenoids, which support photosynthesis in lower light levels.
Additional Knowledge:
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Orange light: Orange light is absorbed, but less efficiently compared to blue and red light.
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Violet light: Violet light is highly absorbed by chlorophyll, but green light remains the most effective overall for photosynthesis as it contributes significantly alongside red and blue light.
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Pink light: Pink light is a combination of red and blue light and can be absorbed but does not offer the same level of absorption as the individual components.