Relativity
Kinematics, Doppler, rockets, and spacetime diagrams
Lorentz factors
γ, β, E–p with Minkowski sketch
2-body collision
Fixed-target lab ↔ COM
Two-body decay
Q-value and lab boost
Velocity addition
Collinear & 2D addition
Relativistic Doppler
Frequency shift vs angle
Aberration of light
Angle transform under boosts
Compton scattering
λ′ and recoil electron
Production threshold
Fixed-target & collider
Relativistic rocket
Photon & exhaust rockets
Proper time & twins
Clock rates and age gap
Four-momentum
Invariant mass & boosts
Relativistic beaming
Headlight effect δⁿ