MadSci Network: Physics

Re: why does a solution containing chlorophyll reflect red light

Date: Wed May 9 10:27:36 2001
Posted By: Jeff Robertson, Faculty, Physical Sciences, Arkansas Tech University
Area of science: Physics
ID: 989282769.Ph

On the contrary, the chlorophyl molecule readily absorbs
red/orange light leaving the blues and greens to be
reflected hence, giving most plants their green color.

Green food coloring does the same thing for the same reason.

All dyes and pigments are based on molecules that absorb different
frequencies of light.  Those frequencies that are absorbed, correspond
to energy levels of the molecules that make up the dyes.
The other frequencies are left alone and combine to make the
"color" of the object.


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