1.

The wavelength of a photon and the deBroglie wavelength of an electron and uranium atom are identical. Which one of them will have highest kinetic energyA. PhotonB. electronC. U-atomD. nothing can be predicted

Answer» Correct Answer - A
`lambda_(D)=h/p =h/(sqrt(2mE)) rArr E=(h^(2))/(2mlambda^(2)) E prop 1/m` (for electron and uranium)
for photon and electron
`lambda_("photon") =lambda_("electron")` (given)
`p_("photon")=p_("electron")`
`(E_("electron"))/(E_("photon"))=(1/2 mv^(2))/(P_("photon")xxC) =((P_("electron")V)/2)/(P_("photon")xxC)=v/(2C)`


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