Assume the speed of light in vacuum is

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Problem

Assume the speed of light in vacuum is 3.00×108 m s−13.00\times10^{8}\,\text{m}\,\text{s}^{-1}. What is the frequency of ultraviolet radiation that has a wavelength of 250 nm250\,\text{nm} in vacuum? (a) 7.50×1014 Hz7.50\times10^{14}\,\text{Hz} (b) 1.20×1015 Hz1.20\times10^{15}\,\text{Hz} (c) 1.20×1014 Hz1.20\times10^{14}\,\text{Hz} (d) 1.50×1015 Hz1.50\times10^{15}\,\text{Hz}

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