The energy of X-ray photon of wavelength 1.65 Å is `(h=6.6 xx 10^(-34)J-sec,c=3xx10^(8)ms^(-1),1eV=1.6xx10^(-19)J)`

The energy of X-ray photon of wavelength 1.65 Å is
`(h=6.6 xx 10^(-34)J-sec,c=3xx10^(8)ms^(-1),1eV=1.6xx10^(-19)J)`
A. 3.5 keV
B. 5.5 keV
C. 7.5 keV
D. 9.5 keV

The energy of X-ray photon of wavelength 1.65 Å is `(h=6.6 xx 10^(-34)J-sec,c=3xx10^(8)ms^(-1),1eV=1.6xx10^(-19)J)`

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