Photoelectric Effect Flashcards
1
Q
The energy of a photon (1)
A
E = hf
2
Q
The energy of a photon (2)
A
E = hc/lambda
3
Q
An increase in frequency does what to energy
A
increases it
4
Q
What is the work function of a material
A
The minimum energy required to remove an electron from the surface of the metal.
5
Q
If the energy of a photon > work function then
A
electrons will be emmited
6
Q
if the energy of a photon > work function then
A
the extra energy becomes the Ek of the electron
7
Q
Ek equation
A
hf = work function + Ek
8
Q
What does increasing the intensity of light do?
A
Increases the number of - photons and electrons but the speed of electrons stays the same.
9
Q
Increasing frequency does what?
A
Increases the speed of electrons but their number stays the same.
10
Q
What does reducing wavelength do
A
The same as increasing frequecy
