Atoms

In a circular motion, a body changes its direction by in one - fourth of its time period. Given, magnetic field, Let be the time-period of revolution of proton in the magnetic field. (i) and and be the time-period of revolution of -particle in the magnetic field, (ii) Now, the ratio of time-period of proton and -particle, by dividing E (i) and (ii), Hence, the time-period of -particle is double of the proton, i.e. if proton covers of angle from its starting, then -particle will cover of the angle.