A single source. Interference...
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- Harold Stanley
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1 Water Waves
2 Water Waves
3 A single source Interference...
4 Two sources Interference...
5 If two people walk toward a point and both start on the same foot-- d 10 steps 11 steps y At the point where they meet they are out of step one is on the right foot and the other on the left foot.
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7 Constructive interference a bright spot. If two beams of light meet and are both on the same foot then their intensities add.
8 Destructive interference a dark spot. If two beams of light meet and are opposite feet then their intensities cancel and you get a dark spot.
9 Two speakers are driven with the same oscillator, oscillating in phase with each other. They put out waves with a wavelength of 3 meters. One speaker is 3.2 meters away from me and the other is 4.7 meters from me. Which of the following best describes what will occur? A. A loud sound due to constructive interference B. A soft sound due to destructive interference C. Something in between full constructive and full destructive interference D. None of the above
10 Two speakers are driven with the same oscillator, oscillating in phase with each other. One speaker is 3.2 meters away from me and the other is 4.7 meters from me. Which of the following wavelengths will result in optimum constructive interference? A. 1.0 meters B. 0.6 meters C. 0.5 meters D. 0.4 meters E. None of the above
11 Two speakers are driven with different oscillators, one generating a wavelength of 3 meters, the other generating a wavelength of 3.5 meters. One speaker is 3.2 meters away from me and the other is 4.7 meters from me. Which of the following best describes what will occur? A. A loud sound due to constructive interference B. A soft sound due to destructive interference C. Something in between full constructive and full destructive interference D. None of the above
12 DOING THE DISHES IS NOT A PROCESS, IT'S AN OUTCOME Success equals failure plus a good story?
13 Luke And they all with one consent began to make excuse. The first said unto him, I have bought a piece of ground, and I must needs go and see it: I pray thee have me excused. 33 So likewise, whosoever he be of you that forsaketh not all that he hath, he cannot be my disciple.
14 What does this have to do with light?
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19 How can I calculate where fringes will appear?
20 How can I calculate where fringes will appear?
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22 Discussion question: For longer wavelengths the minimums and maximums A. Get closer together B. Get further apart C. Stay the same distance apart D. None of the above
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25 Discussion question: When the slits get closer together, the minimums and maximums A. Get closer together B. Get further apart C. Stay the same distance apart D. None of the above
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28 I shine a laser at a double slit aperture. The slits in the aperture are 1 micrometer apart. The first order diffraction fringe is 41.2 degrees away from the zeroth order fringe. What is the wavelemgth of the laser? A. 352 nm B. 329 nm C. 659 nm D micrometers E. None of the above
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31 Discussion question: An interference pattern is formed on a screen by shining a planar wave on a double-slit arrangement (left). If we cover one slit with a glass plate (right), the phases of the two emerging waves will be different because the wavelength is shorter in glass than in air. If the phase difference is 180, how is the interference pattern, shown left, altered? A. The pattern vanishes B. The bright spots get closer together. C. The bright spots get farther apart. D. There are no changes. E. Bright and dark spots are interchanged
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34 Why don t I see an interference pattern From two light bulbs? Coherence (temporal and spatial) Polarization
35 Interference of BEC
36 Discussion question: Can you get a real image from a diverging lens A. Yes B. No C. I don t know
37 Group question: A 10 cm tall object is placed 8 cm to the left of a converging lens of focal length 4 cm. A diverging lens of focal length -6 cm is 6 cm to the right of the converging lens. The image is A. Real and upright B. Real and inverted C. Virtual and upright D. Virtual and inverted
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