Electrons used in an electron microscope are accelerated

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Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased to 100kV then the de–Broglie wavelength associated with the electrons would

1. increase by 2 times
2. decrease by 2 times
3. decrease by 4 times
4. increase by 4 times

Correct Option: B

λ ∝	1
	√V

λ₂ =	λ₁
	2