Physics Chapter 24

• Maxwell's Equation 1: Electric field lines originate on positive charges and terminate on negative charges
• Maxwell's Equation 2: Magnetic field lines are continuous (no beginning or end)
• Maxwell's Equation 3: A changing magnetic field induces an emf and an electric field. The direction of the emf opposes the change.
• Maxwell's Equation 4: Magnetic fields are generated by moving charges or by changing electric fields
• High-frequency EM waves are more energetic and

  are more able to penetrate than low-frequency

  waves
• High frequency EM waves can carry more

  information per unit time than low-frequency waves
• The shorter the wavelength of any EM wave probing

  a material, the smaller the detail it is possible to

  resolve
• EM waves travel at the speed of light
• Transverse wave: when the electric and magnetic field are perpendicular to one another and to the direction of propagation