What is the frequency of a photon of ultraviolet radiation with a wavelength of 365nm?

Question

 scientific notation

Answer 1

We are given the wavelength, and asked to find the frequency.  From the expression that c = λν where c = speed of light, λ is the wavelength and ν is the frequency, we can solve for frequency. First convert 365 nm to meters (3.65x10^-7 m)

3x10⁸ m/sec = 3.65x10^-7 m x ν

ν = 3x10⁸ ms^-1/3.65x10^-7 m = 8.22x10¹⁴ s^-1