Quanta:
Planck’s idea that energy exchange and radiation happens in packets of energy.
Planck said that the photoelectric effect helped him.

Bohr Frequency Condition:
E = Energy magnitude OR change in energy (Joules)
v = frequency (nu) (Hz)
h = Planck’s Constant = 6.629e-34 J s

The Photoelectric Effect:
Electrons are ejected from metals if hit by UV radiation.

Photon:
A packet of energy
Ex.
Red light is actually just a stream of low energy photons

The Work Equation:
If the energy is less than what is required, then it won’t eject
This means that at higher frequencies, the number of electrons, doesn’t change, but the kinetic energy does.

Diffraction:
Basically cutting up waves, so they deflect weirdly.
Proves the light behaves like a wave.

Constructive Interference:
Increased amplitude of waves
(Added on top of each other)

Destructive Interference:
Decreased amplitude of waves
(Taken the average of)

De Broglie Relation:
A “matter” wave, will also have mass, so this:
v = Speed (m/s)
m = Mass (kg)
Linear Momentum (p) = m*v

Heisenberg Uncertainty Principle:
This says that the uncertainty of the momentum and position of a particle can’t go higher than some constant, which means, if one uncertainty is big, then the other one must be small.
So you know 90% of the momentum, then you know 10% of the position.