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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 the first minimum adjacent to the central maximum of a single-slit diffraction
- Two identical flutes produce fundamental notes of frequency 300 Hz at 27° C
- A copper disc of radius 0.1 m is rotated about its centre, with 10 revolutions
- There are four light-weight-rod samples A,B,C,D seperately suspended by threads
- An inductor coil is connected to a 12 V battery and drawing a current 24 A. This coil
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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