grade 11 physics question...chlorophyll, absorption of pigments etc?

Question

9. a) Chlorophyll produces a green solution with organic solvents. The complex chlorophyll molecules must transmit mainly the green wavelength of white light.
i) Which colours must be absorbed?
ii) Which colours should be most suitable for stimulating photosynthesis in indoor plant life?

b) A gardener tries to grow better plants by building a glass house with green glass instead of normal transparent glass. Comment on his experiment.

Please help me and write in sentences with valid points if possible for at least 9.b). I am not sure what to write. I realise that it wouldn't be helpful to use green glass. It could even be detrimental to the health and lifespan of the plants. Normal transparent glass allows the suns rays through normally which help the plant produce photosynthesis using the sunlight, glucose and water etc. A healthy plant has green pigment called chlorophyll. By using green transparent glass...(see I don't know what to say!). Please help me.

9. i) I was going to say it absorbs all other colours of the visible spectrum (red, orange, yellow, blue, indigo and violet)

I am not sure about 9ii)
I thought maybe white light and/or violet light.

Why would violet tinted glass be a better colour? Please explain answerer 2. Thanks

Answer 1

9a. Chlorophyll appears green because it does not absorb green light. Chlorophyll does absorb other wavelengths of light, particularly the ends of the spectrum, red and violet. Green is in the middle of the spectrum. This means that red and violet light would be beneficial for indoor plants, though full-spectrum lights make the plants look better.

9b. A glass house with green glass will transmit green wavelengths of lights to the plants living inside. Green light is exactly the type of light that green plants do not absorb, and therefore, do not use for photosynthesis. If the glass must be tinted, violet would be a better choice.

Answer 2

do your own hw!!!!

9a) i. it reflects green so it absorbs everything else like red and violet
ii. reds and anything besides green

b) that experiment sucks because the light wouldn't get absorbed and photosynthesis ability will be really poor