High Intensity

Moderators: Chem_Mod, Chem_Admin

Jordan Young 2J
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am
Been upvoted: 1 time

High Intensity

Postby Jordan Young 2J » Wed Oct 09, 2019 2:56 pm

When discussing the photoelectric effect, is "high intensity" the same as "increasing the number of photons"? Are they synonymous? If so, does higher intensity just mean more/brighter light?

Posts: 105
Joined: Thu Jul 25, 2019 12:18 am

Re: High Intensity

Postby haileyramsey-1c » Wed Oct 09, 2019 3:51 pm

When you increase the intensity of light you increase the number of photons emitted. As intensity increase the amplitude increases. Yes, intensity is like brightness in that intensity is the amount of energy delivered in a certain time to a certain area.

Katie Bart 1I
Posts: 104
Joined: Sat Aug 24, 2019 12:16 am

Re: High Intensity

Postby Katie Bart 1I » Wed Oct 09, 2019 4:34 pm

So light intensity is determined by both amplitude and the number of photons? Do they play an equal part in determining frequency, or does one overpower the other?

Posts: 95
Joined: Wed Sep 11, 2019 12:17 am

Re: High Intensity

Postby BNgo_2L » Thu Oct 10, 2019 2:48 pm

In the photoelectric effect, intensity has little to do with the intensity of the light. Because the energy emitted in this experiment doesn't act like a wave, high intensity/amplitude does not eject electrons and produce kinetic energy from the metal surface unless the E(photon) is greater than or equal to the E(threshold of removing an electron). In the photoelectric effect, higher frequency is what will produce kinetic energy as electrons are removed and photons are emitted.

Haley Chun 4H
Posts: 54
Joined: Sat Aug 17, 2019 12:18 am

Re: High Intensity

Postby Haley Chun 4H » Thu Oct 10, 2019 3:49 pm

When light acts as a particle, higher intensity means higher number of photons. When light acts like a wave, higher intensity means higher kinetic energy.

Posts: 72
Joined: Wed Sep 18, 2019 12:18 am

Re: High Intensity

Postby salvadorramos3k » Fri Oct 11, 2019 1:00 am

Regarding the photoelectric effect, increasing the intensity of light means that you are increasing the amount of photons present. However, increasing the intensity of light does not allow for the displacement of electrons as the threshold is not meant since only the amplitude of the waves are changing and not the frequency.

Return to “Properties of Light”

Who is online

Users browsing this forum: No registered users and 4 guests