[" 21.An electron and a photon have same...

[" 21.An electron and a photon have same wavelength of "10^(-9)m" .If "E" is the energy of the photon "],[" and "p" is the momentum of the electron,the magnitude of "E/p" in "SI" units is: "],[" a) "1.00times10^(-9)],[" (b) "1.50times10^(8)],[" () "3.00times10^(8)],[" (d) "1.20times10^(7)]

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[" 21.An electron and a photon have same wavelength of "10^(-9)m" .If "E" is the energy of the photon "],[" and "p" is the momentum of the electron,the magnitude of "E/p" in "SI" units is: "],[" a) "1.00times10^(-9)],[" (b) "1.50times10^(8)],[" () "3.00times10^(8)],[" (d) "1.20times10^(7)]

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