によって Juan Longoria 12年前.
609
magnetism,electromagnetism and electromagnetic radiation
The concepts of magnetism, electromagnetism, and electromagnetic radiation are interconnected through various physical laws and theories. Magnetic states of matter include diamagnetic, paramagnetic, and ferromagnetic substances, each with its own susceptibility to magnetic fields.
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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
