Clickers7

Clickers7 - (distant screen) 3. Fraunhofer diffraction...

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A laser beam is directed onto a wide slit and the diffraction picture is seen on the screen behind it. The diffraction minima occur when the path difference between the waves from the slit is equal to 1. Integer number of wavelengths 2. Odd integer number of wavelengths 3. Odd integer number of half-wavelengths 4. There is no simple relationship
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What is the difference between the Fraunhofer and Fresnel diffraction 1. Fraunhofer diffraction considers rays that are approximately parallel (distant screen limit), Fresnel diffraction considers rays that are not parallel (the screen is close) 2. Fraunhofer diffraction considers rays that are not parallel (the screen is close) , Fresnel diffraction considers rays that are approximately parallel
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Unformatted text preview: (distant screen) 3. Fraunhofer diffraction considers wide slits, Fresnel diffraction considers narrow slits 4. Fraunhofer diffraction considers narrow slits, Fresnel diffraction considers wide slits Diffraction gratings are used to determine 1. The velocity of light in the medium 2. The spectrum of light wavelengths emitted by a source 3. The distance between atoms in solids X-ray diffraction is used to determine 1. The velocity of light in the medium 2. The spectrum of light wavelengths emitted by a source 3. The distance between atoms in solids What is the typical wavelength of X-rays? 1. a meter 2. a millimeter 3. a micrometer 4. 10-10 m (Angstrom)...
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This note was uploaded on 01/10/2010 for the course PHY na taught by Professor Richardscalettar during the Fall '09 term at UC Davis.

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Clickers7 - (distant screen) 3. Fraunhofer diffraction...

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