The h in this equation represents Planck's constant, which equals 6.63 x 10^ -34 J/s. When atoms get excited they begin gaining energy which effects the frequency of the light it is emitting. Each atom has their own emission spectrum called an atomic fingerprint.
Here is a website explaining this in more detail:http://www.pveducation.org/pvcdrom/properties-of-sunlight/energy-of-photon
Here is a website explaining more about what Planck's constant is and why it is used in this equation: http://www.britannica.com/science/Plancks-constant
Kendall, I found your post very educational! First, I liked how you explained how an atom can get excited and emit an atomic fingerprint when it drops energy levels. In addition, I liked how your first post had a calculator that you can check your practice examples on. Lastly, your last post was very helpful, explaining the origin and meaning of Planck's constant. Thanks!
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