Question

Among the following particles, which will have
the shortest wavelength when accelerated by
one million eV?​

Answer 1

Answer:

The momentum of the particle is given by, P=mv.

Among all the particles, α-particle has the greatest mass.

Therefore, the momentum for α-particle would be the greatest.

Wavelength is inversely related to momentum as given in the relation below:

λ=  h/ P

​  

, where h is the Planck's constant.

Hence, α - particle has the shortest wavelength.