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Ch06
 

Ch06

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    Ch06 Ch06 Presentation Transcript

    • Waves and Electromagnetic Radiation Chapter 6 Great Idea : Whenever an electrically charged object is accelerated, it produces electromagnetic radiation—waves of energy that travel at the speed of light
    • Chapter Outline
      • The Nature of Waves
      • The Electromagnetic Wave
      • The Electromagnetic Spectrum
    • The Nature of Waves
    • Energy Transfer by Waves
      • Wave
        • A traveling disturbance
      • Properties of waves
        • Wavelength
        • Frequency
        • Velocity
        • Amplitude
    • Energy Transfer
    • The Properties of a Wave
    • The Relationship among Wavelength, Frequency, & Velocity
      • Velocity of a wave
        • Equation:
    • Waves Passing a Sailboat
    • The Two Kinds of Waves: Transverse and Longitudinal
      • Transverse
        • Motion is perpendicular to wave direction
      • Longitudinal
        • Motion is same direction as wave
    • Transverse and Longitudinal Waves
    • Science by the Numbers
      • The Sound of Music
    • An Organ Pipe Produces a Single Note
    • The Science of Life
      • Use of Sound by Animals
    • Interference
      • Interference
        • Constructive interference
          • Act together
    • Interference
      • Interference
        • Destructive interference
          • Cancellation
    • Interference Pattern
    • The Electromagnetic Wave
    • Albert A. Michelson
    • The Anatomy of the Electromagnetic Wave
      • Point A - Maximum strength, but decreasing
      • Point B - Minimum strength, but increasing
      • Electromagnetic waves continue through internal mechanisms and transfer energy as they travel
    • Light and the Energy of Electromagnetic Waves
      • Speed of light
        • All electromagnetic waves have same velocity
        • c = 300,000km/s
      • Energy
        • Higher frequency = blue color
        • Lower frequency = red color
    • The Speed of Light
    • The Doppler Effect
      • Doppler effect
        • Wave motion is independent of its source
        • If source moves, frequency appears to change
    • The Doppler Effect
    • Transmission, Absorption, and Scattering
      • Transmission
        • Wave passes through matte r
      • Absorption
        • Wave and energy are absorbed
      • Scattering
        • Waves absorbed and reemitted
          • Diffuse scattering
          • Reflection
    • Refraction
    • Absorption of Sunlight by Asphalt
    • Diffuse Scattering of Sunlight
    • Scattering of Light through Reflection
    • The Electromagnetic Spectrum
    • The Electromagnetic Spectrum
      • Maxwell’s equations
        • Predicted more waves
      • Hertz
        • Radio waves
    • The Electromagnetic Spectrum
    • Radio Waves and Microwaves
      • Radio waves
        • Range: kilohertz to hundreds of megahertz
        • Longest waves
      • Microwaves
        • Range: 1mm–1m
    • The Stealth Fighter
    • Technology
      • AM and FM Transmission
    • Technology
      • Microwave ovens
    • Infrared Radiation
      • Infrared radiation
        • Range: 1mm–1µ
      • All warm objects emit radiation
    • Heat Escaping from People
    • Visible Light
      • Visible light
        • Range: 700nm–400nm
      • Colors
        • Slices of electromagnetic spectrum
    • A Glass Prism Separating White Light
    • Path of Light through the Human Eye
    • Ultraviolet Radiation
      • Ultraviolet radiation
        • Range: 400nm–100nm
        • Shorter wavelength=more energy
          • Damage to cells
      • Fluorescence
    • Protect Skin with Sunblock
    • X-rays and Gamma Rays
      • X-rays
        • Range: 100nm–0.1nm
        • High-frequency
        • Medicine
      • Gamma Rays
        • Range: 0.1nm (10 –10 m)–10 –12 m
        • Highest frequency
        • Medicine
        • Astronomy
    • X-rays