[" 76.The de Broglie wavelength of a photon is twice the "],[" de Broglie wavelength of an electron.The speed of the "],[" electron is "v_(e)=(c)/(100)." Then "],[[" (a) "(E_(e))/(E_(p))=10^(-4)," (b) "(E_(e))/(E_(p))=10^(-2)],[" (c) "(p_(e))/(m_(e)c)=10^(-1)," (d) "(p_(e))/(m_(e)c)=10^(-4)]]