Threshold Energy

H-Atom ()

Moderators: Chem_Mod, Chem_Admin

Adrienne_4F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Threshold Energy

Postby Adrienne_4F » Wed Oct 10, 2018 4:06 pm

Can someone explain what threshold energy is and how it is relevant to today's lecture? Thank you.

Leela_Mohan3L
Posts: 44
Joined: Fri Sep 28, 2018 12:26 am

Re: Threshold Energy

Postby Leela_Mohan3L » Wed Oct 10, 2018 4:08 pm

Threshold energy is the amount of energy required to remove an electron from an atom of a certain material. The electron will only be removed if the light source has enough energy to overcome this threshold energy.

Hope that helps!

Nicole Lee 4E
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

Re: Threshold Energy

Postby Nicole Lee 4E » Wed Oct 10, 2018 8:27 pm

The threshold energy is the work required to remove an electron from a metal surface. The energy of the photon must be greater or equal to the threshold energy in order to remove an electron from the surface. E(photon) - Threshold Energy = Kinetic Energy of Electron

Rylee Nelsen 3A
Posts: 37
Joined: Fri Sep 28, 2018 12:22 am

Re: Threshold Energy

Postby Rylee Nelsen 3A » Wed Oct 10, 2018 8:34 pm

The threshold energy is basically the minimum kinetic energy required to remove an electron. Also, the energy of photoelectrons emitted when light hits a metal depends on the frequency. When light with the right frequency is shone onto a metal surface, electrons are emitted from the surface.

leediane0916
Posts: 31
Joined: Fri Sep 28, 2018 12:29 am

Re: Threshold Energy

Postby leediane0916 » Wed Oct 10, 2018 8:42 pm

Threshold Energy is the minimum required amount of E that a photon should contain for the photon to release an electron from the metal surface. The threshold E + E of the electron is equal to the E of the photon. As explained in the lecture, if the electron's E is 0, that means that the photon's E was equal to the threshold E, leaving no excess E (kinetic E)


Return to “Bohr Frequency Condition, H-Atom , Atomic Spectroscopy”

Who is online

Users browsing this forum: No registered users and 0 guests