Question 48 of 155

The rest mass of a proton is 1.673 x 10-27 kg and that of the electron is 9.109 x 10-31 kg. What must be the speed of the proton which has the same de Broglie wavelength as an electron moving with a speed of 9 x 106 m/s?

(A) 3600 m/s

(B) 4900 m/s

(C) 4300 m/s

(D) 5600 m/s