JEE Main 202124 Feb, Evening shiftPhysicsMediumDual Nature of Matter and Radiation146× since 2002The de-Broglie wavelength of a proton and α\alphaα-particle are equal. The ratio of their velocities is :AOption A. 4 : 2BOption B. 4 : 3COption C. 4 : 1DOption D. 1 : 4CheckSkip · show solution