# Do photoelectric effect suggest that the emission of energy by an atom be quantized

1. Apr 13, 2008

### haoku

1. The problem statement, all variables and given/known data

Do photoelectric effect suggest that the emission of energy by an atom be quantized

2. Relevant equations

3. The attempt at a solution

I think it is true as photoelectric effect told us that atom emitt energy in terms of electron.

2. Apr 13, 2008

### rock.freak667

Not sure since the photoelectric effect occurs when EM radiation is incident on a metal only.

But if you consider the energy levels in atoms, an electron will only be sent to a higher energy level if it absorbs EM energy equal to the difference in the n=0 level to another.

$E_1-E_2=hf$

So, if EM radiation of a known frequency is incident on an atom and hf is equal to that difference, then the electron will move to a higher energy state.

Last edited: Apr 13, 2008