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Given below are some famous numbers associated with electromagnetic radiations in different contexts in physics. State the part of the electromagnetic spectrum to which each belongs.
14.4 keV [energy of a particular transition in `""^(57)Fe` nucleus associated with a famous high resolution spectroscopic method (Mossbauer spectroscopy).

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Here , Energy E=14.4 KeV=14.4 `xx10^(3)xx1.6xx10^(-19) J`
As E=hv
`therefore v=(E)/(h)=(14.4xx10^(3)xx1.6xx10^(-19))/(6.6xx10^(-34))~~3xx10^(11) MHz`
This frequency lies in the Z-ray region of electromagnetic spectrum.
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