Dee says that she has developed special sunglasses to enable people to see light with wavelengths of 550–700 nanometers. Would these be useful for humans??

a. ?No—these frequencies are already visible to humans.
b. ?Yes—but only for seeing very faint lights.
c. ?No—unless one is looking at very bright lights.
d. ?Yes—these frequencies are normally outside of human range.


ANSWER:
a

Psychology

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