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PhysicsModern PhysicsDe Broglie & Matter WavesEasy2 minPYQ_2011

PhysicsEasysingle choice

Electrons used in an electron microscope are accelerated by a voltage of $25 kV$ . If the voltage is increased to $100 kV$ then the de-Broglie wavelength associated with the electrons wouldNEET 2011 (Screening)

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Solution:

We have $λ = \frac{12.27}{V}$ $SO$ , $\frac{λ _{1}}{λ _{2}} = \frac{V _{2}}{V _{1}} λ_{2} = λ_{1} \frac{V _{1}}{V _{2}} λ_{2} = λ_{1} \frac{25}{100} λ_{2} = λ_{1} \frac{1}{4} = \frac{λ _{1}}{2}$

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

⏱ 2mℹ️ Source: PYQ_2011

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