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A ray of green light has a wavelength of 5.34 x 10-7 m. What is the frequency? (Hint: remember the speed of light!)

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wave goes one wavelength in one period T
so
5.34*10^-7 = 3*10^8 (approximately) * T
T = (5.34/3) * 10^-15 seconds
f = 1/T = (30/5.34)10^14 Hz

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