Intensity vs. Frequency of light

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Melody Haratian 2J
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Intensity vs. Frequency of light

Postby Melody Haratian 2J » Tue Oct 13, 2020 9:39 pm

Hello everyone! I was watching the photoelectric effect video module and had some questions after watching it.
What’s the difference the intensity of light and its frequency? Also, what happens when you change the intensity of light vs. when you change its frequency? Thank you!

Eileen Quach Dis 2A
Posts: 170
Joined: Wed Sep 30, 2020 9:49 pm

Re: Intensity vs. Frequency of light

Postby Eileen Quach Dis 2A » Tue Oct 13, 2020 10:10 pm

The intensity of the light is the number of photons the light contains, while the frequency is the amount of energy each photon of light has. Changing the intensity of the light will add more photons. However, no matter how many photons there are, if each photon does not have enough energy to remove electrons from a given metal, which is determined by frequency, then no electrons will be ejected. The higher the frequency there is, the more energy there is to remove electrons.


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