
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Calculate the number of photons of light with a wavelength of 3000 pm that provide 2 J of energy.
Expert Solution

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Step 1
It is required to calculate the total number of photons having a total energy of 2 J. Energy of one photon can be calculated as,

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Step 2
Here, ‘h’ is Planck’s constant and ‘ν’ is the frequency of radiation. Expressing ν in terms of speed of light (c) and wavelength (λ),

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Step 3
Substituting the value of ‘ν’ in equation, we get the energy of one photon, which is given as,

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Step 4
The equation obtained in the previous step is the energy of a single photons and for ‘N’ photons, the total energy is given as,

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