intensity, photons, and frequency


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Funmi Baruwa
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intensity, photons, and frequency

Postby Funmi Baruwa » Wed Oct 14, 2020 4:23 pm

In one lecture Dr. Lavelle said that intensity is proportional to the numberer of photons, is this also the same for photons and frequency?

Mary Gallo 1G
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Re: intensity, photons, and frequency

Postby Mary Gallo 1G » Wed Oct 14, 2020 4:34 pm

Hi! Increasing the number of photons does not increase their frequency, just the intensity of the light. Instead, the frequency of an individual photon is proportional to the energy of that photon. Hope this helps!

Gerardo Ortega 2F
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Re: intensity, photons, and frequency

Postby Gerardo Ortega 2F » Wed Oct 14, 2020 4:38 pm

So intensity is proportional to the number of photons, which is proportional to the number of electrons ejected. However, the number of photons is not proportional to frequency. If the energy of the photons does not meet the work function (minimum energy required to eject an electron), then no electrons will be ejected, no matter how many photons are added.

Nathan Lao 2I
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Re: intensity, photons, and frequency

Postby Nathan Lao 2I » Wed Oct 14, 2020 4:40 pm

I don't think intensity necessarily refers to frequency since frequency has to do with the wavelength and the energy of the light. In terms of the photoelectric effect, I'm assuming intensity means using more photons of the same wavelength as opposed to a higher/lower energy light to eject the electron.

Jaden Ward 3J
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Re: intensity, photons, and frequency

Postby Jaden Ward 3J » Wed Oct 14, 2020 5:00 pm

Intensity is proportional to the number of photons (aka the number of electrons emitted) but it is not proportional to the frequency. It does not matter how many photons you have, if they do not meet the requirements of the threshold energy (the amount of energy it takes to eject an electron), then no electrons are ejected.

Funmi Baruwa
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Joined: Wed Sep 30, 2020 9:50 pm

Re: intensity, photons, and frequency

Postby Funmi Baruwa » Thu Oct 15, 2020 8:24 am

that makes a lot of sense thank you very much1

Brandon Le 3C
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Re: intensity, photons, and frequency

Postby Brandon Le 3C » Thu Oct 15, 2020 11:37 pm

Increasing the number of photons would increase the intensity of the light, which is the same as increasing the amplitude of the wave model. However, changing the amplitude does not affect wavelength or frequency. Therefore, increasing the number of photons would have no affect on the wavelength or frequency of the wave model.

Eunice_Castro_1G
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Re: intensity, photons, and frequency

Postby Eunice_Castro_1G » Fri Oct 16, 2020 12:07 am

Hi! Increasing the intensity of light increases the number of photons, but does not increase the energy per photons, meaning the frequency will not increase. Hope this helps!


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