Practicing Success
Practicing Success
CUET Preparation Today
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 |
increase by 2 times decrease by 2 times decrease by 4 times increase by 4 times |
decrease by 2 times |
$λ∝\frac{1}{\sqrt{V}}$ $⇒\frac{λ_1}{λ_2}=\sqrt{\frac{V_2}{V_1}}=\sqrt{\frac{100keV}{25keV}=2}⇒λ_2=\frac{λ_1}{2}$ |
