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Which one of the following is an additional feature of the focusing cameras?

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in Solid State Chemistry by (14.1k points)
Which one of the following is an additional feature of the focusing cameras?

(a) X-ray

(b) Crystal monochromator

(c) Gamma rays detector

(d) Electron stopper

I have been asked this question in a national level competition.

This interesting question is from Modern X-Ray Powder Techniques and their Applications topic in section X-Ray Diffraction of Solid State Chemistry

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Correct choice is (b) Crystal monochromator

The explanation: In the focusing cameras an additional feature is the crystal monochromator which serves two functions, to give highly monochromatic radiation and to produce an intense, convergent X-ray beam.

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