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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsDe Broglie & Matter WavesMedium2 minPYQ_2023

PhysicsMediumsingle choice

If the potential difference used to accelerate electrons is doubled, by what factor does the de-Broglie wavelength associated with electrons change?

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Answer:

Solution:

From $λ = \frac{h}{2 mqV}$ , $λ \propto \frac{1}{V}$ If potential difference is doubled, $λ \propto \frac{1}{2 V}$ $∴ λ$ is decreased by $\frac{1}{2}$ times.

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

⏱ 2mℹ️ Source: PYQ_2023

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