Examples of waves and particles of light


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Samantha Lee 1A
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Examples of waves and particles of light

Postby Samantha Lee 1A » Fri Oct 16, 2020 10:53 am

Can someone please give some examples of when light acts like a wave v. when light acts like a particle (some examples we may see on an exam). Thank you

Marisa Gaitan 2D
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Re: Examples of waves and particles of light

Postby Marisa Gaitan 2D » Fri Oct 16, 2020 11:07 am

I think the most important thing to know is that light is acting like a particle or a "stream of photons" in the photoelectric effect and is acting like a wave in diffraction. As long as we have a strong understanding of the behavior of light in those scenarios, I'm thinking we'll be okay for the exams. If they give us another example on a test, I'm sure we could apply what we know from these two experiments to identify the behavior.

VincentLe_3A
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Joined: Wed Sep 30, 2020 10:01 pm

Re: Examples of waves and particles of light

Postby VincentLe_3A » Fri Oct 16, 2020 11:39 am

To add on, it is just conceptually important to distinguish the difference between the classical mechanics model and quantum mechanics model of light. In the classic mechanics model, light acts as a wave whereas in the quantum mechanics model, light is absorbed and emitted in discrete units (photons). As stated earlier, I think it is sufficient to know and understand the key piece of evidence for each model, which are light diffraction (suggests light is a wave) and the photoelectric effect experiment (suggests light is a photon).


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