The de – Broglie wavelength of a proton and alpha particle is same, the ratio of their velocities is : The de - Broglie wavelength of a proton and alpha particle is same the ratio of their velocities is : September 26, 2021 Category: JEE Mains Physics 2002-2019 Solved Video Solutions , Practice Set 1 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related