Physics · 2020
JEE Main · 7 January 2020, Shift 2 · Q18
An electron (of mass m) and a photon have the same energy E in the range of a few eV. The ratio of the de-Broglie wavelength associated with the…
An electron (of mass m) and a photon have the same energy E in the range of a few eV . The ratio of the de-Broglie wavelength associated with the electron and the wavelength of the photon is ( $\displaystyle \mathrm{c}=$ speed of light in vacuum)
Official answer
(3)
$\displaystyle \frac{1}{c}\left(\frac{E}{2 m}\right)^{1 / 2}$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.