What is the velocity of the hydrogen atom after absorbing the photon?

Thread starter dannie
Start date May 31, 2013
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Atom Hydrogen Hydrogen atom Photon Velocity

AI Thread Summary

The discussion centers on the velocity of a hydrogen atom after it absorbs a photon with an energy of 10.2 eV. It is clarified that while the atom absorbs energy, it does not remain stationary; instead, it gains momentum. The energy absorbed increases the atom's kinetic energy, resulting in a measurable velocity. The relationship between energy, mass, and velocity is critical to understanding this process. Ultimately, the hydrogen atom does not remain at rest after photon absorption.

May 31, 2013

dannie

A stationary hydrogen atom with a mass of 1.67 x10^-27 kg absorbs a photon of light with an energy of 10.2eV.What is the velocity of the hydrogen atom after absorbing the photon?

This is my question:

Is it true that the atom has no speed since all the energy is completely absorbed at the energy level 10.2eV?

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May 31, 2013

tiny-tim

Science Advisor

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hi dannie!

hint: momentum

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