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11.Dual Nature of Radiation and matter
medium
The approximate wavelength of a photon of energy $2.48 \,eV$ is ............ $\mathring A$
A$500$
B$5000 $
C$2000 $
D$1000$
Solution
(b) By using $E\,(eV) = \frac{{12375}}{{\lambda ({Å})}}$
$ \Rightarrow \,\,\lambda \, = \frac{{12375}}{{2.48}} = 4989.9\,{ \mathring A}\, \approx \,5000\,{ \mathring A}$
$ \Rightarrow \,\,\lambda \, = \frac{{12375}}{{2.48}} = 4989.9\,{ \mathring A}\, \approx \,5000\,{ \mathring A}$
Standard 12
Physics
