PHYSICS 135 Chapter Notes - Chapter 24: Electromagnetic Spectrum, Radio Wave, Energy Density

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An electromagnetic wave can be created by accelerating charges; moving charges back and forth will produce oscillating electric and magnetic fields, and these travel at the speed of light. An electromagnetic wave transports its energy through a vacuum at a speed of 3. 00 x 108 m/s. The energy of the wave is stored in the electric and magnetic fields. The energy carried by the wave is proportional to the frequency of the wave. Electromagnetic waves are split into different categories based on their frequencies (wavelength). The electromagnetic spectrum is split up based upon frequency. The energy is divided equally between the electric field and magnetic field. The intensity of an electromagnetic wave is the power per unit area. Intensity = the speed of light constant multiplied to the energy density. Visible ray portion: 4x1014 hz 7. 9x1014 hz. X-ray has the higher frequency @ 1018 hz, but it has the shorter wavelength at 10-10 m.