JEE Main 7 Jan 2020 Shift 2 Solved Paper

Section: Physics

Question : 20 of 75

Marks: +1, -0

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 (c = speed of light in vacuum)

[7 Jan 2020 Shift 2]

(
E
2m
)1∕2
1
c
(
E
2m
)1∕2
c(2mE)1∕2
1
c
(
2E
m
)1∕2

Validate

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