## Photons

$c=\lambda v$

Arshiya
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### Photons

I understand that a photon must have a high enough energy to remove an electron? However, why can't two photons combine there energy to eject an electron?

Carissa Young 1K
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

### Re: Photons

In lecture, someone asked the same question and Professor Lavelle said it can happen where two photons combine to eject an electron but it's SUPER rare for this to happen which is why we use 1 photon to eject 1 electron as it happens most commonly.

I hope this helps.

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### Re: Photons

In lecture, Dr. Lavelle also mentioned that one photon interacts with one electron.

Mark 1D
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### Re: Photons

A single photon requires the sufficient energy needed to remove a single electron. :)

Anna O 2C
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Joined: Fri Sep 28, 2018 12:19 am

### Re: Photons

For two photons to combine their energy to eject one electron, they would 1) need to hit the electron at the same time in order for both energies to add up to enough for an ejection which is extremely rare, and 2) like Dr. Lavelle said I think that the premise for our entry level quantum mechanics is that these interactions occur on a 1-to-1 basis where in one electron is affected by a single photon, otherwise extremely low frequency light at a high intensity could hypothetically mash together and combine their energies to release one electron even if there are several hundred single photons present.