A proton and an electron have the same kinetic energy. What is the ratio of their de Broglie wavelengths? (mₚ = 1.67 × 1
λₚ/λₑ = √(mₑ/mₚ) ≈ √(5.45×10⁻⁴) ≈ 0.0233.
Ref: NCERT Class 11 Chemistry > Chapter 2: Structure of Atom > Topic: Quantum Mechanical Model - de Broglie Heisenberg and Schrodinger