Lecture 22 - Recap of last lecture Bright rings when net...

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Recap of last lecture Bright rings when net phase shift = 2t+ λ /2 =m λ or 2t = (m+ ½) λ and dark rings when 2t = m λ m=0,1,2,… Thin film coatings can make perfect reflectors or perfect absorbers Diffraction
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Fraunhofer Diffraction P will be a dark band if ½asin θ = ½ λ Or sin θ = m λ /a m =±1, ±2, … If x >> a then sin θ ~ θ ~ tan θ therefore minima is at θ = λ /a or y = x λ /a All minima at y = xm λ /a with m =±1, ±2, …
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In a single-slit diffraction experiment with waves of wavelength λ there will be no intensity minima (that is, no dark fringes) if the slit width is small enough. What is the maximum slit width a for which this occurs? A. a = λ /2 B. a = λ C. a = 2 λ D. l t depends on the distance between the slit and the screen where the diffraction pattern is formed.
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Problem 36.6 On Dec 26, 2004 a quake off the coast of Sumatra produced a huge tsunami. Scientists observing the wave on the open ocean measured the time between Crests to be 1.0 hr and the speed of the wave to be 800 km/h. The waves
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This note was uploaded on 01/27/2012 for the course PH 2233 taught by Professor Dipinkardutta during the Spring '11 term at Mississippi State.

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Lecture 22 - Recap of last lecture Bright rings when net...

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