An electron of mass 
and a photon have same energy 
. The ratio of de-Broglie wavelengths associated with them is [NEET 2016]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Since, it is given that electron has mass 
. de-Broglie's wavelength for an electron will be given as
…… ..(i)
As kinetic energy of electron
……… (ii)
From Eqs. (i) and (ii), we get
…… ..(iii)
Energy of a photon can be given as
…… ..(iv)
Now, divide Eq. (iii) by Eq. (iv), we get
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