Wavelengths of the Electromagnetic Spectrum: Sample Problems

Try each one on paper first. Only then reveal the solution — reading a worked answer you never attempted teaches you almost nothing.

1. 1. A photon has a wavelength of 500 nm. Find its frequency.

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2. 2. Find the energy of that 500 nm photon.

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3. 3. Which carries more energy per photon: a 700 nm red photon or a 400 nm violet photon?

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Al says…

Remember the order with 'Raging Martians Invaded Venus Using X-ray Guns': Radio, Microwave, Infrared, Visible, Ultraviolet, X-ray, Gamma.