THE ELECTRON

1. 
   the kinetic energy gained by an electron in accelerating through a potential difference V.
2. 
3. 
   where E is the energy of a photon, h is Planck’s constant and f is the frequency of the photon.
4. 
   where E is the energy of a photon, h is Planck’s constant and  is the wavelength of the photon.
5. 
   where  is the work function (the minimum energy required to just free an electron from a metal), h is Planck’s constant and  is the minimum frequency of light which will liberate an electron from a metal.
6. 
   where hf is the energy of an incident photon,  is the work function of a metal and  is the maximum kinetic energy of the resulting photo-electron.