E(Photon) greater than/equal to (Energy Remove e-)  [ENDORSED]

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Gisselle Sainz 2F
Posts: 76
Joined: Wed Feb 21, 2018 3:00 am

E(Photon) greater than/equal to (Energy Remove e-)

Postby Gisselle Sainz 2F » Sat Apr 14, 2018 3:10 pm

The textbook states, "If the energy of the photon is LESS THAN the energy required to remove an electron from the metal, then an electron will not be ejected, regardless of the intensity of the radiation" (pg 12) and "[electrons will be ejected when the photon energy is greater than the work function]" (pg 13.

However, in class, we established that electrons are not emitted regardless of light intensity when the energy of the photon is GREATER THAN the energy to remove an electron. Can someone explain this to me? Which statement is correct?

NatalieSDis1A
Posts: 39
Joined: Fri Apr 06, 2018 11:05 am

Re: E(Photon) greater than/equal to (Energy Remove e-)

Postby NatalieSDis1A » Sat Apr 14, 2018 3:25 pm

The statement from the book is correct. I think you may have accidentally wrote it down backwards.
If E(photon) < threshold energy then the electron will not eject.
If E(photon) > threshold energy then the electron will eject.

Hussein Saleh 1L
Posts: 32
Joined: Tue Feb 20, 2018 3:01 am

Re: E(Photon) greater than/equal to (Energy Remove e-)  [ENDORSED]

Postby Hussein Saleh 1L » Sat Apr 14, 2018 4:01 pm

NatalieSDis1A wrote:The statement from the book is correct. I think you may have accidentally wrote it down backwards.
If E(photon) < threshold energy then the electron will not eject.
If E(photon) > threshold energy then the electron will eject.

Yeah, I agree with the book. I even have it written down in my notes that way.


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