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You fire a beam of x-rays with a wavelength 1.4 x 10-10 m at a crystal and observe the interference pattern as a function of the incident angle. When the incident x-ray beam makes an angle of 16.0" with the planes in the crystal (the Bragg angle) you observe the first order constructive interference. What is the maximum Bragg angle for higher order constructive interference? A. 33.5 10

You fire a beam of x-rays with a wavelength 1.4 x 10-10 m at a crystal and observe the interference pattern as a function of the incident angle. When the incident x-ray beam makes an angle of 16.0" with the planes in the crystal (the Bragg angle) you observe the first order constructive interference. What is the maximum Bragg angle for higher order constructive interference? A. 33.5 10

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Use the following setup for the next two questions. You fire a beam of x-rays with a wavelength 1.4 x 10-10 m at a crystal and observe the interference pattern as a function of the incident angle. When the incident x-ray beam makes an angle of 16.0" with the planes in the crystal (the Bragg angle) you observe the first order constructive interference. What is the maximum Bragg angle for higher order constructive interference? A. 33.5° B. 48.0" C. 55.8° D. 74.0⁰ E. 80.0⁰ If you were to use electrons instead of x-rays, at what speed must the electrons be moving to see constructive inference at the same angles as with the x-ray beam? Note that the mass of an electron is 9.1 x 10-31 kg. A. 2.6 x 106 m/s B. 5.2 x 106 m/s C. 1.0 x 107 m/s D. 2.8 x 107 m/s E. 5.6 x 107 m/s
Transcribed Image Text:Use the following setup for the next two questions. You fire a beam of x-rays with a wavelength 1.4 x 10-10 m at a crystal and observe the interference pattern as a function of the incident angle. When the incident x-ray beam makes an angle of 16.0" with the planes in the crystal (the Bragg angle) you observe the first order constructive interference. What is the maximum Bragg angle for higher order constructive interference? A. 33.5° B. 48.0" C. 55.8° D. 74.0⁰ E. 80.0⁰ If you were to use electrons instead of x-rays, at what speed must the electrons be moving to see constructive inference at the same angles as with the x-ray beam? Note that the mass of an electron is 9.1 x 10-31 kg. A. 2.6 x 106 m/s B. 5.2 x 106 m/s C. 1.0 x 107 m/s D. 2.8 x 107 m/s E. 5.6 x 107 m/s
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