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College Physics (Urone)
Found in: Page 1110

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Short Answer

Crystal lattices can be examined with x rays but not UV. Why?

UV wavelengths are much larger than X ray wavelengths, which are normally the same order of magnitude as the distance between the lattices. A diffraction pattern cannot be created by incident beams with wavelengths greater than the lattice spacing in a crystal.

See the step by step solution

Step by Step Solution

Step 1: Define characteristic x rays

The electromagnetic radiation released by an atom when an inner shell vacancy is filled is known as a characteristic x-ray. When electrons jump from a higher to a lower energy state, these x-ray radiations are emitted by the atom.

Step 2: Given information 

Given that crystal, lattices can be examined with x-rays but not UV rays.

Step 3: Determine the conclusion for the question

The reason for this is because whereas x-rays may be used to study crystal lattices, UV rays cannot. The energy of photons is known to be inversely proportional to their wavelength. The wavelength of x rays falls within a range of lattice parameters, whereas the wavelength of UV rays does not. As a result, x-rays are employed instead of UV radiation to examine crystal lattices.

Therefore, the crystal lattices can be examined with x-rays but not UV rays.

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