An electron and an alpha particle have the same de Broglie wavelength. What is the ratio of their velocities? (mₑ = 9.1
vₑ/v_α = m_α/mₑ ≈ 7297.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Quantum Mechanical Model - de Broglie Heisenberg and Schrodinger