A particle is travelling 4 times as fast...

A particle is travelling 4 times as fast as an electron. Assuming the ratio of de-Broglie wavelength of a particle to that of electron is 2:1, the mass of the particle is:

`1/16 " times the mass of " e^(-)`

16 times the mass of `e^(-)`

8 times the mass of `e^(-)`

`1/8 " times the mass of " e^(-)`

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