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Hydrogen Spectra

One of the fo...

Question

One of the following wavelengths is absent and the rest are present in the X-rays coming from a Coolidge tube. Which one is the absent wavelength?

A

25 pm

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B

50 pm

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C

75 pm

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D

100 pm.

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Solution

The correct option is A 25 pm
The missing wavelength from the X-rays coming from the Coolidge tube is -
$25 \times 10^{- 12} m = 25 p m$

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