magnetism,electromagnetism and electromagnetic radiation

magnetism,electromagnetism and electromagnetic radiation

Main topic

Oersted's experiment

interaction between electons's magnetic field is created by moving electons

F = qvB

moving charged particle induces magnetic field perpedicular to its motion

electromagnetism

motionless electrons

magnetic field

electric field

Albert Einstein's relativity equation

E = mc squared

conversion of energy into matter

Maxwell's wave equations

V = f times wavelength

electromagnetic photons are determined by kinetic energy lost

oscillating electric and magnetic fields cause wave's at 90 degrees

photons speed up/slow down and have origin and termination

electromagnetic radiation

a charge in motion geterates magnetic field

a resting electric charge radiates an electric field

Plank's Quantum Theory

E = hf = hc / wavelength

electromagnetic radiation interacts with particle/wave

magnetic fields

solenoid

B = F / Idl

imaginary lines of magnetic induction

B = F / p

magnetic domains

magnetism

aligned

no magnetism

randomly oriented

magnetic states of matter

diagmagnetic

susceptibility <1

repelled by magnet

unaffected by magnet

paramagnetic

susceptibility 0-1

very weakly magnetized

ferromagnetic

susceptibility >1

easily magnetized

laws of magnetism

magnetic induction

magnetic permeability

attract/repel

dipoles

south pole

north pole

magnetic forces

Lorentzian force

total force of moving electrons

F = qE + qvB

Faraday's Law

applies voltage to magnetic field and direction of electron flow

V = -dB / dt

Gauss's Law

F = kpP / d squared