Chemistry · 2019
JEE Main · 8 April 2019, Shift 2 · Q53
If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength λ, then for 1.5 p momentum…
If p is the momentum of the fastest electron ejected from a metal surface after the irradiation of light having wavelength $\displaystyle \lambda$, then for $\displaystyle 1.5$ p momentum of the photoelectron, the wavelength of the light should be :
(Assume kinetic energy of ejected photoelectron to be very high in comparison to work function) :
Official answer
(4)
$\displaystyle \frac{4}{9} \lambda$
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JEE Main 2019 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.