Quantum Physics Flashcards
1
Q
Energy of a photon = ……
A
E=hc/wavelength
2
Q
1eV = …..
A
1.6x10^-19 J, the energy of an electron when accelerated through. pd of one volt
3
Q
what is the photoelectric effect?
A
the emission of photoelectrons from the surface of a metal when there is a light wave incident to it
photons must have energy greater then the work function to emit photoelectrons
4
Q
condition for photoelectric effect
A
frequency of waves must be high enough so that the electrons have enough energy to be emitted (threshold frequency)
5
Q
what is work function?
A
the energy required for an electron to reach the surface of a metal
