Practice portal › Dual Nature of Matter and Radiation › Comparing de Broglie Wavelengths of Particles

A proton, a neutron, an electron and an α-particle have same energy. If λₚ, λₙ, λₑ and λ_α are the de Broglie's wavelengths of proton, neutron, electron and α particle respectively, then choose the correct relation from the following

Asked in JEE Main 25th June 2nd Shift 2022 · Same or changed energy

• (1) λₚ=λₙ>λₑ>λ_α
• (2) λ_α<λₙ<λₚ<λₑ
• (3) λₑ<λₚ=λₙ>λ_α
• (4) λₑ=λₚ=λₙ=λ_α

Step-by-step solution

Why the other options are wrong

• (1) comes from puts the electron behind the nucleons, though it is by far the lightest
• (3) comes from puts the electron at the short end of the range
• (4) comes from would need all four masses to be equal

Reading this solution needs no sign-in. You only sign in to practise against the clock and keep your progress.