## Light acts as a wave or not?

$c=\lambda v$

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Joined: Fri Sep 28, 2018 12:23 am

### Light acts as a wave or not?

I'm still a bit confused as to wether light acts as a wave or not and in what situations this happens. Also, which situation would we be dealing with more often?

Hovik Mike Mkryan 2I
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Joined: Fri Sep 28, 2018 12:25 am

### Re: Light acts as a wave or not?

Hello,
According to my notes from Mondays lecture, I noted that light acts as both waves and particles. This is due to the fact that at such a small scale it is possible to have both properties. Hope this cleared up your question!

Sabrina Ryu 3L
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Joined: Fri Sep 28, 2018 12:26 am

### Re: Light acts as a wave or not?

Light does act as both a wave and a particle! On Monday's lecture we focused on the particle aspect while talking about the photoelectric effect, black bodies, and atomic spectra. However, if you read the book there are more details about the wave aspect of light, including diffraction and the Schrodinger equation. As for which of the two we will be focusing on, I think both parts are important, because light and other particles wave particle duality, meaning both characteristics apply.

megan blatt 2B
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Joined: Fri Sep 28, 2018 12:28 am

### Re: Light acts as a wave or not?

Light acts as both a wave and a particle. When dealing with quantum mechanics, light is assumed to act as a particle and is absorbed and emitted in discrete units. However, it also has wave like qualities, such as electromagnetic radiation, wavelength, and frequency. I believe that we go over light's properties from both perspectives, but the most recent lecture covered light as a particle.

JT Wechsler 2B
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### Re: Light acts as a wave or not?

Depending on the experiment and on the situation, light has the ability to act both as a wave and as a particle. It can get cloudy and confusing at times, but light is able to do both depending on how you are collecting the data.

Parth Mungra
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Joined: Fri Sep 28, 2018 12:28 am

### Re: Light acts as a wave or not?

I had a similar question to yours. During our Monday lecture, Dr. Lavelle said that we don't know what light looks like, but we have these two models. I'm confused as to why we keep using the classical wave model if we have found an experiment that shows the wave model is not correct. Why don't we use the packets of light model to describe light instead of waves?

Karla_Ocampo 4E
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### Re: Light acts as a wave or not?

Hi! According to my notes, light does act as both a wave and a particle. Hope this helps!

Nicole Lee 4E
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Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

### Re: Light acts as a wave or not?

Light acts as both, but we use the quantum model for specific topics and the wave model for others. Dr. Lavelle emphasized on Monday that the wave model does not apply to the photoelectric effect.

Leslie Cheng 4B
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Joined: Fri Sep 28, 2018 12:29 am

### Re: Light acts as a wave or not?

We do not know exactly what light looks like, so we can only come up with models of it. We have the wave model and the particle model. The particle model was only conceived of when the photoelectric effect was discovered. Therefore, light has qualities of both the wave and particle models, but it also lacks qualities of both. Hope this helped!

ran2000
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Joined: Fri Sep 28, 2018 12:15 am

### Re: Light acts as a wave or not?

Light acts like both a wave and a particle. Depending on the situation, for questions in class, we tend to adopt the wave or particle model which fits a particular explanation.

Parth Mungra
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

### Re: Light acts as a wave or not?

What's the difference between the description of ray vs light? Ex. Gamma Ray vs Ultraviolet light
I'm sure we won't need this information, just curious.