Electron beam used in an electron microscope, when accelerated by a voltage of 20 {\kV}. has a de-Broglie wavelength of \lambda_o. If the voltage is increased to 40 {\kV}. then the de-Broglie wavelength associated with the electron beam would be: [25-Jan-2023 Shift 1]

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

[25-Jan-2023 Shift 1]

3λ0
9λ0
‌
λ0
2
‌
λ0
√2

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