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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsAtomic structureEasy2 minPYQ_2007

PhysicsEasysingle choice

Two electrons one moving in opposite direction with speeds $0.8 c$ and $0.4 c$ where $c$ is the speed of light in vacuum. Then the relative speed is about

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Solution:

Relative speed is given by $u = \frac{u ^{'} + v}{1 + \frac{u ^{'} v}{c ^{2}}}$ Here, $u^{'} = 0.8 c$ and $v = 0.4 c$ $∴ u = \frac{0.8 c + 0.4 c}{1 + \frac{( 0.8 c ) ( 0.4 c )}{c ^{2}}} = \frac{1.2 c}{1.32} = 0.9 c$

Stream:VITEEESubject:PhysicsTopic:Modern PhysicsSubtopic:Atomic structure

⏱ 2mℹ️ Source: PYQ_2007

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