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Electrons used in an electron microscope are accelerated by a voltage of 25 kV. If the voltage is increased associated to 100 kV then the de-Broglie wavelength associated with the electrons would
Options
(a) increase by 2 times
(b) decrease by 2 times
(c) decrease by 4 times
(d) increase by 4 times
Correct Answer:
decrease by 2 times
Explanation:
λ ∞ 1/√V
λ₁ / λ₂ = √ V₂ / V₁ = √ 1000keV / 25 keV = 2
λ₂ = λ₁ / 2
Related Questions: - The ratio of the nuclear radii of elements with mass numbers 216 and 125 is
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- Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
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Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The ratio of the nuclear radii of elements with mass numbers 216 and 125 is
- An adiabatic process occurs at constant
- An ideal heat engine works between temperature T₁=500 K and T₂=375 K.
- Two electrons are separated by a distance of 1Å. What is the coulomb force between them?
- The binding energy of deutron is 2.2 MeV and that of ₂⁴He is 28 MeV.
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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