AP Physics 2 Unit 7 Cram topics

Wave Particle Duality

light is a wave and a particle

DeBroglie Wavelength

wavelength = h/mv`

Planck’s Constant

h = 6.63×10^-34 Js

Energy of a Photon

E=hf

Fundamental relationship between wavelength, speed, and frequency

v = f*wavelength

Theory of Relativity

E = mc²

The frequency of a wave depends on

the source

Bohr Model (rings)

Energy levels

Standard State

Lowest Energy Level

Blackbody Radiation

Any matter with heat will periodically convert heat to photons, dissipating it as light.

Blackbody Radiation (equation)

Wavelength(max) = Wien’s constant / Temperature

Wein’s constant (b)

2.9 × 10^-3m*K

Mu

10^-6

Nano

10^-9

Stefan Boltzmann Equation

Q/t = A*sigma*T^4

Stefan Boltzmann Constant

5.67×10^-8 W/(m²*k^4)

Photoelectric Effect (Equation)

Kmax = hf - work function

Work function

Energy required to eject electron from material

Compton Scattering

The scattering of photons by electrons where the scattered photon has a lower energy than the incident photon

Compton Scattering (equation)

change in wavelength = h/mc * (1-cos)

Nucleon

Proton or Neutron

Radioactive Decay Constant

Wavelength = ln2/t1/2

Radioactive Decay Formula

N = No*e^-wavelength*time

Alpha Decay

Produces an alpha particle with atomic number 2, and mass number 4

Beta(+) decay

Atomic number decreases by 1

Beta(-) decay

Atomic Number increases by 1

Gamma Decay

Energy is released in the form of a gamma ray (no changes to atomic number or mass)

Binding Energy

E = mass deficit * c²