## Frequency vs Energy per Photon

AryaG_4C
Posts: 50
Joined: Mon Sep 30, 2019 12:16 am

### Frequency vs Energy per Photon

In lecture we were told that increasing the energy via increasing the no. of photons happens for light when it behaves like a particle however does the amount of energy per photon play a role?

Ryan Yee 1J
Posts: 101
Joined: Sat Aug 17, 2019 12:16 am

### Re: Frequency vs Energy per Photon

To my understanding, increasing energy per photon increases the frequency and decreases the wavelength for light. This energy per photon is what allows electrons to surpass the threshold energy and increase an energy level. Increasing the number of photons with insufficient energy only increases the amplitude of the light wave, and, if the energy (determined by frequency) is insufficient to surpass the threshold energy, then the electron will not increase an energy level.

Chantel_2I
Posts: 109
Joined: Sat Sep 07, 2019 12:19 am

### Re: Frequency vs Energy per Photon

The amount of energy per photon is important in removing electrons. Simply increasing the number of photons does not remove more electrons because each photon still has insufficient energy. However, by increasing the energy of each photon, rather than the number of photons allows each photon to be able to remove an electron.

EMurphy_2L
Posts: 128
Joined: Sat Sep 07, 2019 12:16 am

### Re: Frequency vs Energy per Photon

Increasing *intensity* (aka number of photons) increases the wave amplitude of light but his has no effect on electron removal. Electrons can be removed based on the wavelength and frequency (short wavelength/ high frequency) of the light which is why it has particle like properties. If the photon has enough energy to remove an electron, increasing the intensity *will* impact electron removal. ie; if the intensity of light with a short wavelength/ high frequency capable of removing an electron is doubled, the number of electrons removed will be doubled (it's important to note that this will not double or change the energy of the electron removed)

Nuoya Jiang
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

### Re: Frequency vs Energy per Photon

Increasing the number of photons means increasing the intensity of light, counterintuitively. Only when the energy of each photon is sufficient, can it remove a electron. One photon is responsible for removing an electron, so it is the energy (frequency) counts, not the number of photons.