waves and energy of photons Flashcards
photoelectric effect, interference and energy of a photon
equation for the energy of ONE photon
E = hf
what Is planks constant , with units
6.626 x 10^-34 J s
what is the equation for the energy of one MOLE of photons?
E = energy of one photon x avogadros number
what is avogadros number ?
6.022 x 10^23
definition of the photoelectric effect
Occurs when ultra violet light, above the threshold frequency, strike a metals surface causing electrons to be ejected. The photons of light hitting the metal must also reach the minimum amount of energy, known as the work function.
what is the work function
the minimum amount of energy required to remove an electron from a solid metal surface
what is the threshold frequency
The minimum frequency of electromagnetic radiation required to remove a photoelectron from the surface of a metal.
what is the equation for the work function
hf = O + Eke
what is the equation for the threshold frequency
f0 = O/h
what is p when the Eke equation is rearranged
p = root 2. m. Eke
what is the exact speed of light
2.998 x10^8
relate the equations :
E = hf and c = f wavelength
E = hc/wavelength
