Question

a) Consider an alpha-particle of mass mα and kinetic energy 4.7 MeV. Calculate its velocity and...

a) Consider an alpha-particle of mass mα and kinetic energy 4.7 MeV. Calculate its velocity and compare it to the speed of light. [2 marks] b) Calculate the de Broglie wavelength of the alpha-particle in a) and express your result in fm (femtometer).

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Answer #1

a.Mass of alpha particle

Kg

Since , K.E of alpha particle is  

Velocity of the alpha particle,

So,

  

b.de Broglie wave length of the alpha particle is,  

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