Wavelength of a $1 \;keV$ photon is $1.24 \times {10^{ - 9}}\;m$. What is the frequency of $1 \;MeV$ photon
Wavelength of a $1 \;keV$ photon is $1.24 \times {10^{ - 9}}\;m$. What is the frequency of $1 \;MeV$ photon
- [AIPMT 1991]
- A
$1.24 \times {10^{15}}\;Hz$
- B
$2.4 \times {10^{20}}\;Hz$
- C
$1.24 \times {10^{18}}\;Hz$
- D
$2.4 \times {10^{23}}\;Hz$
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- [AIPMT 2012]
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