Electron beam used in an electron microscope, when accelerated by a voltage of 20 kV, has a de-Broglie wavelength of λ_0. If the voltage is increased to 40 kV, then the de-Broglie wavelength associated with the electron beam would be:

Electron beam used in an electron microscope, when… — JEE Main 2023 Physics PYQ

JEE Main 2023 · 25 Jan · Shift 1

Electron beam used in an electron microscope, when accelerated by a voltage of 20 kV, has a de-Broglie wavelength of

\lambda_0

. If the voltage is increased to 40 kV, then the de-Broglie wavelength associated with the electron beam would be:

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Correct option: A

[JEE Main 2023 · 25 Jan · Shift 1]

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