Electromagnetic Waves

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Electromagnetic Waves
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Light and Matter

• Emission light produced by matter
• Absorption portion of light incident on matter
  that is absorbed
• Transmission portion of light that travels
  through medium
• Reflection light that bounces (reflects) at an
  angle equal to its incident angle

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Electromagnetic Spectrum

• c 300,000 km/s
• l f c

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Spectrum from a Prism
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Example of Spectrum
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Types of Spectra in the Lab
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Photons of Light

• The smallest unit of light is a photon
• A photon is often called a particle of light
• The Energy of an individual photon depends on its
  wavelength (frequency)
• The Energy of a photon is proportional to its
  frequency E h f hc / l

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Electromagnetic Spectrum