Light with a wavelength of is absorbed by an atom

PHYSICS · Subjective · A Level · Physics · Particles and radiation · Particles and radiation

Problem

Light with a wavelength of 620 nm620\,\text{nm} is absorbed by an atom, causing an electron to move to a higher energy state. Determine the energy difference between the two states in electron-volts (eV). Express your answer to two significant figures. Constants: h=6.63×10−34 J⋅sh = 6.63\times10^{-34}\,\text{J}\cdot\text{s}, c=3.00×108 m/sc = 3.00\times10^{8}\,\text{m/s}, 1 eV=1.60×10−19 J1\,\text{eV} = 1.60\times10^{-19}\,\text{J}.

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