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A 3mw laser with frequency 7.49e 14hz hits a mirror with normal incidence. Assume all the photons from the laser are reflected from the mirror
A 3mw laser with frequency 7.49e 14hz hits a mirror with normal incidence. Assume all the photons from the laser are reflected from the mirror back to the direction of the laser. what force does the laser exert on the mirror?
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To find the force exerted by the laser on the mirror we need to calculate the momentum of the photons and multiply it by the number of photons hitting the mirror per second Step 1 Calculate the energy of each photon The energy of a photon is given by E hf where h is Plancks constant and f is the frequency of the photon ...
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Physics
Authors: James S. Walker
5th edition
978-0133498493, 9780321909107, 133498492, 0321909100, 978-0321976444
