Why do photons not obey the wave equation?

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KNguyen_1I
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Joined: Sat Aug 17, 2019 12:16 am

Why do photons not obey the wave equation?

Postby KNguyen_1I » Mon Oct 07, 2019 3:53 pm

So from today's lecture, from my understanding as opposed to normal waves, intensity of a photon merely indicates number of photons bombarding a given object but not necessarily correlative to its energy (which instead relies on frequency/wavelength) which is against the wave model, which usually indicates intensity does equal energy. What property of photons makes this so?

KDang_1D
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Re: Why do photons not obey the wave equation?

Postby KDang_1D » Mon Oct 07, 2019 6:11 pm

Yes, the photoelectric effect showed that photons don't always behave as waves. That's part of what made studying atoms at the quantum level so mysterious, light behaved as a wave and as a particle. This became known as the "wave-particle duality" of light. Later on, we would in fact learn that all matter behaves as waves. It's just the large mass that makes it less observable.

Wilson 2E
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Re: Why do photons not obey the wave equation?

Postby Wilson 2E » Sun Oct 13, 2019 12:49 am

Because of the particle quality of a photon, the interaction between photons and electrons occur one to one, that is the energy from only a single photon is transferred to one electron. If the energy of this single interaction does not meet the work function threshold, the electron will not be ejected. If light solely behaved like a wave, as was previously theorized, increasing intensity would proportionally increase the energy of light and allow for a change in electron ejection to occur even if wavelength is kept constant.

Ruby Richter 2L
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Re: Why do photons not obey the wave equation?

Postby Ruby Richter 2L » Sun Oct 13, 2019 2:46 pm

Does that mean that if the energy of a photon is greater than or equal to the energy needed to eject an electron, then increasing intensity results in more ejected electrons?

Milisuryani Santoso 1L
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Re: Why do photons not obey the wave equation?

Postby Milisuryani Santoso 1L » Sun Oct 13, 2019 3:22 pm

Ruby Richter 4G wrote:Does that mean that if the energy of a photon is greater than or equal to the energy needed to eject an electron, then increasing intensity results in more ejected electrons?


Yep! Basically because at that point, increasing intensity means you increase the number of photons with that equal or higher energy, which can then eject more electrons from the metal.

Shanzey
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Re: Why do photons not obey the wave equation?

Postby Shanzey » Sun Oct 13, 2019 3:22 pm

Yes, in lecture, Dr. Lavelle's slides said that "if the energy per photon is greater than/equal to the energy needed to remove an electron, then increasing the light intensity results in more ejected electrons."

Miriam Villarreal 1J
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Re: Why do photons not obey the wave equation?

Postby Miriam Villarreal 1J » Sun Oct 13, 2019 5:14 pm

Electrons have discrete energies with only certain wavelengths allowed inside one atom. Therfore the wave moel explains why electrons have quantized energy states in atoms


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