によって Juan Longoria 13年前.
646
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
