What is the wavelength of a photon of red light (in nm) whose frequency is 4.58 x 1014 Hz?

Question

What is the wavelength of a photon of red light (in nm) whose frequency is 4.58 x 1014 Hz?

Answer 1

There's a formula λ = c / f. Plugging in c = 3*10^8 ms^-1 and f = 4.58*10^14 s^-1, this gives λ = 6.55*10^-7 m, or 655 nanometers.

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