1.which is not an example of the measure of the frequency of a wave?
a.
4 waves per second
b.
5 hertz
c.
2 cycles per second
d.
0.10 s per wave
2.which best describes what happens when a person sees a red leaf?
a.
the leaf radiates all colors of light except red to human eyes.
b.
human eyes reflect red light back to the leaf.
c.
the leaf absorbs red light from human eyes.
d.
red light reflected from the leaf enters human eyes.
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