The energy of a photon of light with wavelength $5000\, \mathring A$ is approximately $2.5 eV$. This way the energy of an $X-$ ray photon with wavelength $1\, \mathring A $ would be
- A$2.5/5000 eV$
- B$2.5/{(5000)^2}eV$
- C$2.5 \times 5000\;eV$
- D$2.5 \times {(5000)^2}eV$
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