Question

De Broglie wavelength of a proton and ∝-particle is same, ________ physical quantity should be
same for both.
(A) velocity
(B) energy
(C) frequency
(D) momentum

Answer 1

d) Momentum should same be for both.

• The wavelength (λ) that is associated with an object in relation to its momentum and mass is known as de Broglie wavelength.
• The wavelength is defined as the distance between two peaks of the same vector in the electric field.
• Momentum, on the other hand, is the product of mass and velocity.
• Because photons are quantum objects, they will have the same wavelength if they have the same momentum.
• The de-Broglie law describes the momentum-wavelength relationship.
• λ = h/p where h denotes Planck's constant and p denotes momentum
• Lambda(photon) = h/ (momentum of photon).
• Thus, if wavelength(λ) remains same, momentum remains the same as well while it is not the case with other given physical quantities.

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