Wave vs. Particle

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JoeyAnn Mateo 1D
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Joined: Fri Apr 06, 2018 11:04 am

Wave vs. Particle

Postby JoeyAnn Mateo 1D » Sun Apr 22, 2018 12:50 pm

I'm still a little confused on the differences between the wave and particle model for light. Could someone explain the differences?

nicolesalcedo
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Re: Wave vs. Particle

Postby nicolesalcedo » Sun Apr 22, 2018 12:56 pm

The wave model for light is in regards to wavelength and amplitude (aka intensity). When you look at the light model in regards to particles, you look at the photon energies of the light.

JoeyAnn Mateo 1D
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

Re: Wave vs. Particle

Postby JoeyAnn Mateo 1D » Sun Apr 22, 2018 12:57 pm

In regards to intensity, does it vary if you are looking at increasing intensity in the wave vs. particle model?

nicolesalcedo
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Joined: Fri Apr 06, 2018 11:05 am

Re: Wave vs. Particle

Postby nicolesalcedo » Sun Apr 22, 2018 1:01 pm

If you increase the intensity of the wave, it just increases the number of photons that are being directed at the piece of metal, thus increasing the number of electrons being ejected (1:1 photon electron ratio). However, if the wavelength (aka the energy of the photon) is not enough to eject an electron, then increasing the intensity of the wave will not matter.

JoeyAnn Mateo 1D
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

Re: Wave vs. Particle

Postby JoeyAnn Mateo 1D » Sun Apr 22, 2018 1:04 pm

So basically, increasing the intensity of the light will only result in more electrons coming off of the metal if each photon already has enough energy to remove?

nicolesalcedo
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Re: Wave vs. Particle

Postby nicolesalcedo » Sun Apr 22, 2018 1:04 pm

Yes, exactly :)

nicolesalcedo
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Re: Wave vs. Particle

Postby nicolesalcedo » Sun Apr 22, 2018 6:50 pm

sorry, correction: the wave model is on wavelength and frequency* (not amplitude)

304984981
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Joined: Fri Apr 06, 2018 11:05 am

Re: Wave vs. Particle

Postby 304984981 » Sun Apr 22, 2018 6:52 pm

light is descried as a wave because it has interference, diffraction. Details seen Thomas Young Experiment
Light is described as a particle because of photoelectric effect, which demonstrates that the intensity does not affect the amount of electrons get out, but wavelength/frequency does.

hannahtweedy
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Joined: Tue Nov 21, 2017 3:00 am

Re: Wave vs. Particle

Postby hannahtweedy » Sun Apr 22, 2018 9:24 pm

Particles have mass while photons do not... both still have momentum though!


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