Topic — Maxwell’s equations and the propagation of electromagnetic waves.
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19
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75 linked atoms.
19 Maxwell’s equations and electromagnetic waves
- Dipole antenna
- Worked example — A varying B field generates circulation of E
- Worked example — Solar panel
- Worked example — The Sun, Milan-Naples and mass loss
- Polarising filters and Malus’s law
- The magnetic field inside a charging capacitor
- The capacitor paradox
- The transformer
- The displacement current
- Maxwell’s equations as poetry
- The equations in vacuum and the birth of waves
- The four equations (first, incomplete version)
- Maxwell’s four equations
- The electromagnetic spectrum
- Maxwell and unification: when c emerges from the equations
- Maxwell’s equations in differential form
- Polarisation of EM waves
- Radiation pressure
- Problem — Amplitude E0 from intensity
- Problem — Amplitude E0 from solar irradiance
- Problem — Amplitudes of the solar wave
- Problem — Dimensional analysis of the Poynting vector
- Problem — TV antennas and polarisation
- Problem — B field in a charging capacitor
- Problem — B field in the charging capacitor
- Problem — B field between capacitor plates
- Problem — Rectangular microwave cavity
- Problem — Continuity of B
- Problem — Displacement current and external field
- Problem — Energy of a visible photon
- Problem — Science fiction: epsilon0 doubles
- Problem — Science fiction: mu0 doubles
- Problem — Science fiction: without displacement current
- Problem — Microwave oven
- Problem — Frequency of yellow light
- Problem — Intensity from E0
- Problem — WiFi intensity at 10 metres
- Problem — Reading a graph of I vs r
- Problem — H-alpha line
- Problem — Wavelength of an FM station
- Problem — Wavelength and FM antenna
- Problem — FM wavelength (100 MHz)
- Problem — Microwaves, porcelain and metals
- Problem — EM waves and the structure of the vacuum
- Problem — EM waves without a medium
- Problem — Why the displacement current
- Problem — Crossed polarisers
- Problem — Crossed polarisers with one in between
- Problem — Power from flux density
- Problem — Radiation pressure at ground level
- Problem — Radiation pressure at Earth’s orbit
- Problem — Radiation pressure and comet tails
- Problem — Which EM wave
- Problem — Momentum of a laser pulse
- Problem — Ranking photon energy
- Problem — Ranking intensity at different distances
- Problem — Ranking intensity of four waves
- Problem — Ranking wavelengths
- Problem — Ranking common wavelengths
- Problem — Ratio E0 to B0
- Problem — E-B symmetry and asymmetries
- Problem — Summary of amplitudes and intensities
- Problem — Fermi estimate of an FM station
- Problem — Light travel time Sun-Earth
- Problem — Ideal transformer
- Problem — Solar sail
- Problem — Reflective solar sail
- Problem — Speed of light from vacuum constants
- Problem — True or false on EM waves (1)
- Problem — True or false on EM waves (2)
- Sources of EM waves and Hertz’s experiment
- Structure of a plane wave
- Speed of electromagnetic waves
- Poynting vector and intensity