24.1 Huygens

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• 24.1 Huygens Principle and Diffraction
• Isaac Newton light is a stream of particles
• Christian Huygens light is a wave
• Each point on the old
• wave front is a source for
• the new wave front.

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• 24.2 Huygens Principle and Refraction
• The frequency of light does not change as it
  travels from one medium to the next.

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• 24.3 Interference
• Thomas Young (1801)

4

• 24.3 Interference

5

• 24.3 Interference
• Constructive d sin? m? m 0,1,2,
• Destructive d sin? (m½)? m 0,1,2,

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• 24.3 Interference

7

• 24.4 The Visible Spectrum and Dispersion

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• 24.4 The Visible Spectrum and Dispersion

9

• 24.4 The Visible Spectrum and Dispersion

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• 24.4 The Visible Spectrum and Dispersion

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• 24.4 The Visible Spectrum and Dispersion