Amplitude and Intensity

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Minh-Thy Vo 3D
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Amplitude and Intensity

Postby Minh-Thy Vo 3D » Wed Oct 14, 2020 10:16 pm

If amplitude is the intensity of the light, will increasing the amplitude just increase the number of photons? So increasing amplitude would not have an effect on the energy of the light overall?

Olivia Smith 2E
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Re: Amplitude and Intensity

Postby Olivia Smith 2E » Wed Oct 14, 2020 10:18 pm

That is correct! Increasing amplitude only increases the amount of photons and not the energy of the photon. And is also supported by the photoelectric effect.

Edward Tang 1k
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Re: Amplitude and Intensity

Postby Edward Tang 1k » Wed Oct 14, 2020 10:19 pm

Correct. Increasing amplitude would result in an increased number of photons with the same energy as before the change in amplitude.

Gigi Elizarraras 2C
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Re: Amplitude and Intensity

Postby Gigi Elizarraras 2C » Wed Oct 14, 2020 10:30 pm

Yep you got it! Like professor was talking about, if you increase the number of runners but no one has enough energy to get over the hurdles you will not get anywhere. If you want a photon/runner to get over the hurdle/release an electron you must increase the frequency not the wavelength:)

Ansh Patel 2I
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Re: Amplitude and Intensity

Postby Ansh Patel 2I » Wed Oct 14, 2020 11:11 pm

Yes! The number of photons increases with higher amplitude, but the energy per photon remains the same. Therefore, if a light at a certain frequency is unable to reach the threshold energy of a certain metal, a lower frequency light would be required.

Sam_Marasigan_3D
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Re: Amplitude and Intensity

Postby Sam_Marasigan_3D » Wed Oct 14, 2020 11:21 pm

I agree with everyone! Amplitude increases = an increase to the number of photons.

Inderpal Singh 2L
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Re: Amplitude and Intensity

Postby Inderpal Singh 2L » Thu Oct 15, 2020 12:21 pm

Yes. When the amplitude increases, so does the number of photons.


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