Exercise 2 | Early Quantum Theory

Name: Exercise 2 | Early Quantum Theory
Creator: Chemistry Coach
License: https://chemistry.coach/general-chemistry-1

Chapter 4 - Early Quantum Theory

Hydrogen has an indigo emission line at 410.2 nm.
What is the energy and frequency of a photon of this light?

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Solution

E = hν = hc/λ

E = $\frac{6.626 \times 10^{- 34} \times 3.0 \times 10^{8}}{410.2 \times 10^{- 9}}$ = 4.846 x 10^-19 J

c = λν ⇒ ν = c / λ = 7.314 x 10¹⁴ s^-1