The energy of X-ray photon of wavelength 1.65 $A^{o}$ is

3.5 k e V

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5.5 k e V

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7.5 k e V

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9.5 k e V

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Solution

The correct option is C $7.5 k e V$
$e n e r g y = \frac{h c}{λ}$

= $\frac{1240 e V - n m}{0.165 n m}$ (hc=1240 eV-nm)

= $7.5 \times 10^{3} e V$
$= 7.5 K e V .$
So, the answer is option (C).

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The energy of X-ray photon of wavelength 1.65 Ao is

The correct option is C 7.5keVenergy =hcλ=1240 eV−nm0.165 nm (hc=1240 eV-nm)=7.5×103eV=7.5KeV.So, the answer is option (C).

The energy of X-ray photon of wavelength 1.65 $A^{o}$ is

The correct option is C $7.5 k e V$
$e n e r g y = \frac{h c}{λ}$

= $\frac{1240 e V - n m}{0.165 n m}$ (hc=1240 eV-nm)

= $7.5 \times 10^{3} e V$
$= 7.5 K e V .$
So, the answer is option (C).