Can someone tell me what they want when they say "type of visible light"? The plants were in a window and received the morning sun.
What type of visible light is made available to for plants grown under the clear, red, or blue plastic?
I need to know the "type of visible light?" Is it sunlight?
sunlight is fine, that's what they used in the experiment that I saw. I did something more complicated with this but in another experiment with spinach circles.