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Kuma

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Hey there!

So I need some help...

My Biology IA is investigating the effect of light wavelength (i.e. colour of the light) on the rate of photosynthesis through leaf disks. I'm doing this by putting filters (cellophane) over the light. However, I'm kind of confused as to what my control would be! Would it be the light simply without a filter (white light)? Or literally no light (so in the dark)? I feel like it would have to be without the filter because with no light the control would just be testing the effect of light on photosynthesis rather than coloured light! 

Please Help!! 

From,

A very thankful IB student!

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