Peter is employed on a first year salary of $28,900 at the start of each year after the first,his salary increases by $1100. Wha
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The Planck–Einstein relation 
gives that E, the photon energy, is equal to h, Planck's constant, times <span>ν</span>, the frequency.
We can solve the equation in terms of frequency to get
We substitute our given energy,
, and Planck's constant, 
.
We can solve the equation in terms of frequency to get
We substitute our given energy,