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Chapter 36: Q69P (page 1113)
X rays of wavelength are found to undergo second order reflection at a Bragg angle offrom a lithium fluoride crystal. What is the interplanar spacing of the reflecting planes in the crystal?
The inter planar spacing of the reflecting planes in the crystal is .
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The telescopes on some commercial surveillance satellites can resolve objects on the ground as small as across (see Google Earth), and the telescopes on military surveillance satellites reportedly can resolve objects as small as across. Assume first that object resolution is determined entirely by Rayleigh’s criterion and is not degraded by turbulence in the atmosphere. Also assume that the satellites are at a typical altitude of and that the wavelength of visible light is role="math" localid="1663028559183" . What would be the required diameter of the telescope aperture for (a) role="math" localid="1663028596951" resolution and (b) role="math" localid="1663028635287" resolution? (c) Now, considering that turbulence is certain to degrade resolution and that the aperture diameter of the Hubble Space Telescope is role="math" localid="1663028673584" , what can you say about the answer to (b) and about how the military surveillance resolutions are accomplished?
Suppose that two points are separated by 2.0 cm. If they are viewed by an eye with a pupil opening of 5.0 mm, what distance from the viewer puts them at the Rayleigh limit of resolution? Assume a light wavelength of 500 nm.
A beam of x rays with wavelengths ranging from to scatters from a family of reflecting planes in a crystal. The plane separation is. It is observed that scattered beams are produced forandlocalid="1664277381313" . What is the angle between the incident and scattered beams?
An x-ray beam of a certain wavelength is incident on an NaCl crystal, at to a certain family of reflecting planes of spacing. If the reflection from those planes is of the first order, what is the wavelength of the x rays?
Light of wavelength diffracts through a slit of width and onto a screen that is away. On the screen, what is the distance between the center of the diffraction pattern and the third diffraction minimum?
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