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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
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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
- At a metro station, a girl walks up a stationary escalator in time t₁
- The energy of groundstate (n=1) of hydrogen level is -13.6 eV. The ionistation
- A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively
- Aperture of human eye is 0.2 cm. The minimum magnifying power of a visual
- Two spheres A and B of masses m and m respectively collide. A is at rest initially
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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