A thin lens has a focal length of 10.00 cm for blue light. If the index of refraction for the lens material tends to decrease with increasing wavelength, what is the focal length of the lens for red light?
a. more than 10.00 cm
b. It depends on whether the lens is converging or diverging.
c. also 10.00 cm
d. less that 10.00 cm
A
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