If travelling at same speeds, which of the following matter waves have the shortest wavelength?

(i) Electron

(ii) Alpha particle (He²⁺)

(iii) Neutron

(iv) Proton

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Vishal Baghel | Contributor-Level 10

9 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

Ans: option (ii) Alpha particle (He²⁺)

As the wavelength is inversely proportional to the mass of the particles thus the alpha particles would possess the shortest wavelength among the above given option

$λ = \frac{h}{m v}$

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If travelling at same speeds, which of the following matter waves have the shortest wavelength? (i) Electron (ii) Alpha particle (He2+) (iii) Neutron (iv) Proton