Photoelectric effect Flashcards
1
Q
Describe the photoelectric effect
A
Photons transfer their energy to an electron in a 1:1 interaction
If energy is greater than work function, the electron leaves the surface of the metal.
2
Q
What is the electron volt?
A
An eV is defined as the work done moving an electron through a PD of 1V
3
Q
What is the work function?
A
The minimum energy needed for an electron to escape from the metal surface
4
Q
What is the threshold frequency?
A
The minimum frequency of raditation required to cause an electron on the surface of a metal to be emitted
5
Q
Describe intensity in relation to the photoelectric effect
A
Intensity of the light source is proportional to the number of electrons leaving provided the frequency is high enough
6
Q
How do you convert the electron volt to joules?
A
1eV = 1.60x 10^-19J 1J = 6.25x 10^18eV
