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An alpha particle with initial speed v0 is projected from infinity and it approaches up tor0 distance from the nuclus. Then the initial speed of alpha particle which approaches upto 2r0 distance from the nuclus. Is
Kinetic energy = potential energy½*m*vo2 = k*2e*Ze/ro – (1)and let velocity is vthen½*m*v2 = k*2e*Ze/2ro -(2)then (2)/(1)v2/vo2 = ½then v = vo/Hope it clears.
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