Chapt_37 - University Physics (Prof. David Flory) Chapt_37...

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Unformatted text preview: University Physics (Prof. David Flory) Chapt_37 Monday, August 06, 2007 Name: __________________________ Date: _____________ ___ 1. If we increase the wavelength of the light used to form a double-slit diffraction pattern: A) the width of the central diffraction peak increases and the number of bright fringes within the peak increases B) the width of the central diffraction peak increases and the number of bright fringes within the peak decreases C) the width of the central diffraction peak decreases and the number of bright fringes within the peak increases D) the width of the central diffraction peak decreases and the number of bright fringes within the peak decreases E) the width of the central diffraction peak increases and the number of bright fringes within the peak stays the same ___ 2. When a highly coherent beam of light is directed against a very fine wire, the shadow formed behind it is not just that of a single wire but rather looks like the shadow of several parallel wires. The explanation of this involves: A) refraction D) the Doppler effect B) diffraction E) an optical illusion C) reflection ___ 3. A diffraction grating of width W produces a deviation in second order for light of wavelength . The total number N of slits in the grating is given by: A) 2 W / sin B) ( W / ) sin C) W /2 sin D) ( W /2 ) sin E) 2 / sin ___ 4. The dispersion of a diffraction grating indicates: A) the resolution of the grating B) the separation of lines of the same order C) the number of rulings in the grating D) the width of the lines E) the separation of lines of different order for the same wavelength Write the letter for the correct answer on the answer sheet. Write clearly. Page 1 University Physics (Prof. David Flory) Chapt_37 Monday, August 06, 2007 ___ 5. A student wishes to produce a single-slit diffraction pattern in a ripple tank...
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This note was uploaded on 11/20/2011 for the course PHYSICS 2 taught by Professor Davidflory during the Spring '11 term at WPUNJ.

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Chapt_37 - University Physics (Prof. David Flory) Chapt_37...

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