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प्रश्न
A γ-ray photon is passing near a nucleus and breaks into an electron and positron. The region contains a uniform magnetic field B perpendicular to the plane of motion. Find the time after which they again converted into γ-ray. The force of electrostatic interaction and gravitational interaction may be neglected.
पर्याय
`(2pi"m")/"eB"`
`(pi"m")/(2"eB")`
`(4pi"m")/"eB"`
None of these
MCQ
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उत्तर
`bb((2pi"m")/"eB")`
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