Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)

Published by Pearson
ISBN 10: 0133942651
ISBN 13: 978-0-13394-265-1

Chapter 38 - Quantization - Exercises and Problems - Page 1114: 12


$\lambda = 497~nm$

Work Step by Step

We can write an expression for the energy of each photon: $E = \frac{h~c}{\lambda}$ We can write an expression for the photon emission rate: $R = \frac{P}{E}$ $R = \frac{P~\lambda}{h~c}$ We can find the required wavelength of light: $R = \frac{P~\lambda}{h~c}$ $\lambda = \frac{R~h~c}{P}$ $\lambda = \frac{(2.50\times 10^{17})(6.626\times 10^{-34}~J~s)(3.0\times 10^8~m/s)}{0.100~W}$ $\lambda = 4.97\times 10^{-7}~m$ $\lambda = 497~nm$
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