(frequency) x (wavelength) = speed of light in vacuum
Speed of light in vacuum = 3 x 10^8 m/sec
(a) Wavelength = 350 nm = 350 x 10^(-9) m
Therefore frequency = speed/wavelength
= (3 x 10^8 m/sec) / (350 x 10^(-9) m)
= (8.57 x 10^14) Hz
(b) Wavelength = 500 nm = 500 x 10^(-9) m
Therefore frequency = speed /wavelength
= (3 x 10^8 m/sec) / (500 x 10^(-9) m)
= (6.00 x 10^14) Hz
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