Where does photon energy go if it does not emit an electron?

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Bailey Giovanoli 1L
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Where does photon energy go if it does not emit an electron?

Postby Bailey Giovanoli 1L » Mon Oct 12, 2020 10:53 am

If a photon does have enough energy to emit an electron, where does the energy of the photon go when it hits the metal surface? Does the photon of light just bound off the metal surface?

Darren1j
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Re: Where does photon energy go if it does not emit an electron?

Postby Darren1j » Mon Oct 12, 2020 10:58 am

If the energy of the light is equal to the energy needed to remove an electron, how much energy is left for the electron to travel with (its velocity)?

KatarinaReid_3H
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Re: Where does photon energy go if it does not emit an electron?

Postby KatarinaReid_3H » Mon Oct 12, 2020 11:00 am

I believe that the electrons will always absorb the energy. If the energy of the photon is less than the threshold energy, then the electron will then become excited to higher energy state(n value increases).

Aayushi Jani 3A
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Re: Where does photon energy go if it does not emit an electron?

Postby Aayushi Jani 3A » Mon Oct 12, 2020 11:58 am

The electrons will still absorb the energy, but it would not be enough for them to be ejected/excited to a higher energy level.

SelenaDahabreh1D
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Re: Where does photon energy go if it does not emit an electron?

Postby SelenaDahabreh1D » Mon Oct 12, 2020 12:05 pm

Hi! If there is not enough energy to emit an electron, then that energy will simply be absorbed by the metal.

Yasmina Zaarour 1G
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Re: Where does photon energy go if it does not emit an electron?

Postby Yasmina Zaarour 1G » Mon Oct 12, 2020 12:21 pm

From today's (10/12) lecture, I understood that a certain amount of energy (still below the threshold energy) will excite the electrons without ejecting them. So they are still moving, just not enough to overcome their attraction to the metal.

Jagveer 1I
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Re: Where does photon energy go if it does not emit an electron?

Postby Jagveer 1I » Mon Oct 12, 2020 1:00 pm

In today's lecture professor Lavelle said that if the energy of the photon is not greater than or equal to the threshold energy, then the metal still heats up, but no electrons are emitted. So some of the photon's energy is converted to heat energy.


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