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Dual Nature of Matter

JEE Main level, single correct, medium

76 of 200

Question 76 of 200

In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of $7.5\times {10}^{-12}m,$ the minimum electron energy required is close to:

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Answer: (B) $25keV$

\lambda =\sqrt{\dfrac{150}{V}}\Rightarrow 7.5\times {10}^{-2}=\sqrt{\dfrac{150}{V}}

V=\dfrac{150}{7.5\times 7.5\times {10}^{-4}}=\dfrac{80}{3}kV

V\approx 25KeV

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JEE Main Physics practice question on Dual Nature of Matter (Matter Waves), with the answer and a step-by-step solution. Scan a question from your own book or paper to get a whiteboard video.

In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of 7.5×10−12m,7.5\times {10}^{-12}m,7.5×10−12m, the minimum electron energy required is close to:

JEE Main question paper PDF

More Physics practice

In an electron microscope, the resolution that can be achieved is of the order of the wavelength of electrons used. To resolve a width of $7.5\times {10}^{-12}m,$ the minimum electron energy required is close to: