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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsDe Broglie & Matter WavesMedium2 minPYQ_2023

PhysicsMediumsingle choice

When an electron is accelerated through a potential ' $V$ ', the de-Broglie wavelength associated with it is ' $4 λ$ '. When the accelerating potential is increased to $4 V$ , its wavelength will be

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Solution:

$We know λ = \frac{h}{2 meV} \Rightarrow λ \propto \frac{1}{v}$ $∴ ∴ Given V = 4 V λ \propto \frac{1}{4 V} = \frac{4}{2 V} λ reduces to \frac{λ}{2}$

Stream:MHT_CETSubject:PhysicsTopic:Modern PhysicsSubtopic:De Broglie & Matter Waves

⏱ 2mℹ️ Source: PYQ_2023

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