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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  nucleus associated with

14 e) 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 (Mössbauer spectroscopy)].

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E=14.4 keV

Wavelength($\lambda$) = $\frac{hc}{E}$

=$\frac{6.6\times 10^{-34}\times 3\times 10^{8}}{14.4\times 10^{3}\times 1.6\times 10^{-19}}$

= 0.85 A0

X-rays

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