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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 proton carrying 1 MeV kinetic energy is moving in a circular path of radius
- An object is attached to the bottom of a light vertical spring and set vibrating.
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
- A drum of radius R and mass M, rolls down without slipping along an inclined plane
- Which dimensions will be the same as that of time?
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A proton carrying 1 MeV kinetic energy is moving in a circular path of radius
- An object is attached to the bottom of a light vertical spring and set vibrating.
- A spherical body of emissivity e=0.6, placed inside a perfectly black body is maintained
- A drum of radius R and mass M, rolls down without slipping along an inclined plane
- Which dimensions will be the same as that of time?
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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