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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: - A uniform rope of length 12 m and mass 6 kg hangs vertically from a rigid support.
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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
- A uniform rope of length 12 m and mass 6 kg hangs vertically from a rigid support.
- The velocity of electromagnetic radiation in a medium of permittivity ε₀
- In Wheatstone bridge, three resistors P,Q and R are conncected in three arms
- If radius of earth’s orbit is made 1/4, the duration of a year will become
- The distance of the moon form the earth is 3.8×10⁵ km. Supposing that the eye
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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