Moving with the same velocity, which of the following has the longest

1.	Moving with the same velocity, which of the following has the longest de-Broglie wavelength? (a) β – particle (b) α – particle (c) proton (d) neutron
Answer» (a) β – particle λ = \(\frac{h}{mv}\) λ ∝ \(\frac{1}{m}\) As β – particle (an electron) has the smallest mass, so it has the longest de-Broglie wavelength.

Moving with the same velocity, which of the following has the longest de-Broglie wavelength? (a) β – particle (b) α – particle (c) proton (d) neutron

Answer»

(a) β – particle

λ = \(\frac{h}{mv}\)

λ ∝ \(\frac{1}{m}\)

As β – particle (an electron) has the smallest mass, so it has the longest de-Broglie wavelength.