Photoelectric experiment

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Rishika Yadav 3D
Posts: 53
Joined: Wed Sep 11, 2019 12:17 am

Photoelectric experiment

Postby Rishika Yadav 3D » Sun Oct 13, 2019 7:54 pm

Can someone please explain why it was unexpected that electrons were not emitted even for high intensity light in the experiment?

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Photoelectric experiment

Postby Bryce Barbee » Sun Oct 13, 2019 7:56 pm

This is because they believed that the higher the intensity the higher the energy but the intensity of the light did not matter if there was not enough energy in the photons that were with the wave.

ASetlur_1G
Posts: 101
Joined: Fri Aug 09, 2019 12:17 am

Re: Photoelectric experiment

Postby ASetlur_1G » Sun Oct 13, 2019 7:59 pm

People believed that if the light didn't have enough energy to eject electrons, the intensity of the light would need to increase because they believed that light could be explained by a wave-like model (higher intensity = bigger wave = more energy). However increasing the intensity just increased the number of photons, but no single photon had enough energy to remove the electron.

Tracy Tolentino_2E
Posts: 140
Joined: Sat Sep 07, 2019 12:17 am

Re: Photoelectric experiment

Postby Tracy Tolentino_2E » Sun Oct 13, 2019 8:04 pm

He thought that increasing the light intensity would increase the number of electrons being ejected. This wasn't the case because high light intensity only increased the number of photons, but did nothing to the kinetic energy of the photoelectrons. The energy of the photons stayed the same and probably weren't equal to or greater than the thresh hold energy needed to eject the electrons.


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