A proton and alpha-particle are placed a...

A proton and `alpha`-particle are placed at separation `d` on a smooth surface . The ratio of their speed when separation becomes infinite will be

`4 : 1`

`2 : 1`

`1 : 4`

`1 : 2`

Text Solution

Verified by Experts

The correct Answer is:

By momentum conservation in situation `①` and `②`
`0 = - 4 m v_(alpha) + m v _(p)`
`(v_(p))/(v_(alpha)) = (4)/(1)`

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