## Ek= 0 [ENDORSED]

$\lambda=\frac{h}{p}$

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ErinKim1I
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Joined: Fri Apr 06, 2018 11:03 am

### Ek= 0

What are some situations where you have to set Ek to 0?

Jacob Samuels 1E
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Joined: Fri Apr 06, 2018 11:05 am

### Re: Ek= 0

When you are trying to find the maximum wavelength (or minimum frequency) for an electron to be ejected, the KE = 0.

Alexandra Wade 1L
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### Re: Ek= 0

Also if the question gave the minimum energy of the photon required to emit an electron, we would then assume that Ek is equal to zero.

Vienna Cimetta 1L
Posts: 31
Joined: Thu Feb 01, 2018 3:01 am

### Re: Ek= 0  [ENDORSED]

Ek = 0 when the minimum amount of energy needed to eject an electron is provided by the light wavelength. Therefore, all the energy from the photon is used to eject the electron and there is no excess energy.

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