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Radiation: Particles, Waves, Rays

Radiation: Particles, Waves, Rays. Physics 202 Lecture 7. Energy flow and intensity is related to the amplitude and power of the driving source. “Intensity level” recalibrates the definition of intensity to our physiological sensation.

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Radiation: Particles, Waves, Rays

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  1. Radiation: Particles, Waves, Rays Physics 202 Lecture 7

  2. Energy flow and intensity is related to the amplitude and power of the driving source

  3. “Intensity level” recalibrates the definition of intensity to our physiological sensation

  4. Waves require a source and a medium made up of coupled oscillators near equilibrium Longitudinal Transverse

  5. Any disturbance in the medium acts as a damped oscillator as energy radiates away Solid Liquid Gas Air

  6. All the elements of the medium match the oscillation of the source with a phase shift

  7. If the source is moving, the observed frequency suffers a Doppler shift

  8. When the frequencies of two sources differ, non-sinusoidal beats result Fourier Analysis

  9. Energy propagates along “rays” which move perpendicular to the overall wave fronts Slow

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