Interference, Diffraction & Polarization

Interference, Diffraction & Polarization. PHY232 Remco Zegers zegers@nscl.msu.edu Room W109 – cyclotron building http://www.nscl.msu.edu/~zegers/phy232.html. light as waves. so far, light has been treated as if it travels in straight lines ray diagrams refraction

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Interference, Diffraction & Polarization

Interference, Diffraction & Polarization. PHY232 – Spring 2007 Jon Pumplin http://www.pa.msu.edu/~pumplin/PHY232 (Ppt courtesy of Remco Zegers). light as waves. so far, light has been treated as if it travels in straight lines ray diagrams refraction, reflection

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32. Interference Diffraction

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Diffraction and Interference

Diffraction and Interference. Diffraction Huygen’s Principle Diffraction Lab. Light. Has wave properties. Can diffract. Can constructively or destructively interfere. Wave Fronts. Lines that are perpendicular to the motion of the wave.

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Diffraction and Interference

Diffraction and Interference. Interference Young’s Interference Experiment Diffraction Grating Single-Color Interference Iridescence. Interference. Young’s Interference Experiment.

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Interference and Diffraction

Interference and Diffraction. http://en.wikipedia.org/wiki/Diffraction. Huygens-Fresnel Principle. What if we block some of the wavelets?. Adapted from: Eugene Hecht, Optics , Addison-Wesley, Reading, MA, 1998. Diffraction. If l is large compared to the aperture,

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32. Interference & Diffraction

32. Interference & Diffraction. Topics. Interference & Coherence Destructive & Constructive Interference Two-Slit Interference Interference in Thin Films Diffraction. Interference and Coherence. Waves can interfere: that is, combine together to form complex wave patterns

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Interference and Diffraction

Interference and Diffraction. Chs 37 and 38. Huygen’s Principle. Any wave (including electromagnetic waves) is able to propagate because the wave here affects nearby points there In a sense, the wave is the source for more of the wave

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Diffraction and Interference

Diffraction and Interference. Chapter 31. Huygen’s Principle. Light waves spreading from a point source can be thought of as overlapping secondary wavelets And, every point on a wave front can be regarded as a new point source

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Interference and Diffraction

Interference and Diffraction. Wave Optics. The wave nature of light is needed to explain various phenomena Interference Diffraction The particle nature of light was the basis for ray (geometric) optics Light waves interfere with each other much like mechanical waves do

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Diffraction and Interference

Diffraction and Interference. Explaining the wave nature of light. Christiaan Huygens. Christiaan Huygens improved upon the first Wave Model of Light proposed by Robert Hooke

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Interference and Diffraction

Interference and Diffraction. Chapter 15 Holt. Section 1 Interference: Combining Light Waves. I nterference takes place only between waves with the same wavelength. A light source that has a single wavelength is called monochromatic .

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Interference & diffraction

Chapter 19. Interference & diffraction. Incoherent Light. Coherent Light. Light waves are out of phase with each other. Example: Sunlight. Waves of same wavelength are in phase with each other. Example: Lasers. Fun Fact…. Did you know that the term “laser” is actually an acronym for

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Diffraction and Interference

Diffraction and Interference. Physics Remember: Light is both a particle…and a wave. Light waves through an opening. The extent to which light waves bend depends on the size of the opening. Diffraction. Any bending of a wave by means other than reflection or refraction.

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Interference and Diffraction

Interference and Diffraction. 2 . 2 . 0. 0. . . Destructive Interference. Constructive Interference. x. 2 . 0. . 0. path difference ( x )  phase difference (?). When x < . When x  . Two oscillators or two sources. To point P. . d. d sin .

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interference & diffraction examples

interference & diffraction examples. y. 2p. 2p. w =. k =. l. T. l. l. x. x+ l. = y(x,t). Picture made at time t = 7123670097 sec. y( x , t ) = Asin( k. t ). x – w. two variables x,t. 2p. 2p. l. l. 2 p. - t. y( x + l ,t) =. Asin( ).

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Interference Diffraction and Lasers

Interference Diffraction and Lasers. Chapter 15. Interference of Light. Superposition of 2 identical wavetrains traveling in same or opposite directions Property of all waves, longitudinal and transverse, including light

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Diffraction vs. Interference

Diffraction vs. Interference. Both involve superposition of coherent light Custom Interference – only a few waves Diffraction – large number of waves Fresnel correction to Huygens Principle:

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Interference and Diffraction

Interference and Diffraction. Two Pulses. What happens when two pulses of equal magnitude move towards each other on a string? A) Bounce off each other as if there was a barrier. B) Bounce off each other as if there was an open string. C) Pass through each other like the pulse wasn’t there.

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Interference & Diffraction

Interference & Diffraction. Interference. Like other forms of wave energy, light waves also combine with each other Interference only occurs between waves with the same wavelength Monochromatic – Single colored  light waves of the same wavelength. Interference.

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Interference, Diffraction & Polarization

Interference, Diffraction & Polarization. PHY232 – Spring 2007 Jon Pumplin http://www.pa.msu.edu/~pumplin/PHY232 (Ppt courtesy of Remco Zegers). light as waves. so far, light has been treated as if it travels in straight lines ray diagrams refraction, reflection

506 views • 48 slides