# Energetic Electrons

In atoms, electrons jump between energy levels, and they absorb or radiate energy in the form of light (photons). An electron falls to a lower energy level when it radiates a photon, and jumps to a higher energy level when it absorbs a photon.

Find the wavelength of the photon that radiates when an electron jumps from the $$n = 3$$ energy level down to the $$n = 2$$ energy level. Where is this photon in the electromagnetic spectrum?

Assumptions

• $$h$$ (Planck's constant) = $$4.14 \times 10^-15$$ eV s.
• $$c$$ (Speed of light) = $$3 \times 10^8$$ m/s.
• All values are approximate.
• Assume that this is a hydrogen atom.
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