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Per2_over

# Per2_over - Preview of Period 2 Electromagnetic Waves...

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Preview of Period 2: Electromagnetic Waves – Radiant Energy I 2.1 Energy Transmitted by Waves How can waves transmit energy? 2.2 Refraction of Radiant Energy What happens when a light beam travels through water? 2.3 Focusing Radiant Energy What happens when a light beam strikes a lens? 2.4 The Quantum Model of Electromagnetic Radiation How can the quantum model explain the electric current produced by solar cells and fluorescence? 2-1

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Wavelength, Period, and Frequency Lower Frequency Higher Frequency The period of a wave is the time it takes the wave to complete one cycle. The frequency of a wave is the inverse of its period. frequency = 1/ period Frequency is measured in Hertz (Hz). 1 Hz = 1 cycle/second 2-2 Wave Length Wave Length Distance Wave Period Wave Period Time
The frequency of a wave is the inverse of its period. Frequency is measured in Hertz (Hz). frequency = 1/period The relationship between wavelength and frequency gives the speed of a wave: s = f L s = speed at which radiant energy travels (meters/sec or mi/sec) f = frequency (cycles/sec, or Hertz) L = wavelength (in meters or feet) Compare Electromagnetic and Sound Waves Which type of waves can travel through air? Which type of waves can travel through a vacuum? How do the

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Per2_over - Preview of Period 2 Electromagnetic Waves...

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