If you shine red light at a green plant and green light at another green plant, knowing that a plant must absorb light to grow, which plant will grow faster?

There's no way to tell for sure which plant will grow faster, because we don't know if a plant gets any benefit from red light.
But we do know for sure that it won't be the one we shine green light on. We know that green light is no use to green plants at all ... that's why when green light falls on them, they don't even bother absorbing it. They just let it bounce off, and that's why they look green to us.

Answered by AL2006 | 2024-06-10

The plant exposed to red light will grow faster because it can absorb this light for photosynthesis, while the plant exposed to green light cannot utilize it for growth as it reflects that color. Thus, shining green light on a green plant does not aid in its growth. In summary, the red light plant benefits from absorption while the green light plant does not.
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Answered by AL2006 | 2024-12-26