What is the frequency of light having a wavelength of 4.50x10-6cm?

4.50 x 10 -6 cm = 4.50 x 10 -8 m and c = 3 x 10 8 ms -1 Therefore, f = 3 x 10 8 ms -1 4.50 x 10 -8 m = 6.7 x 10 15 Hertz.

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