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Q.

The energy of a photon of light with wavelength 5000 $\overset{o}{A}$ is approximately 2.5 eV. This way the energy of an X-ray photon with wavelength 1 $\overset{o}{A}$ would be

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a

2.5/5000 eV

b

${2.5 / (5000)}^{2} eV$

c

2.5 x 5000 eV

d

$2.5 \times {(5000)}^{2} eV$

answer is C.

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Detailed Solution

$E \propto \frac{1}{λ} \Rightarrow \frac{2 .5}{E'} = \frac{1}{5000} \Rightarrow E' = (2 .5) \times 5000 eV$

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