If the de Broglie wavelengths associated with a proton and an α-particle are equal, then the ratio of velocities of the proton and the α-particle will be :
4 : 1
2 : 1
1 : 2
1 : 4
As we learnt
De - Broglie wavelength -
- wherein
Option 1)
4 : 1
Option 2)
2 : 1
Option 3)
1 : 2
Option 4)
1 : 4
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