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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 radius of curvature of the convex face of a plano-convex lens is 12 cm
- Find the fundamental frequency of a closed pipe if the length of air column is 42m.
- A block is moving up an inclined plane of inclination 60° with velocity of 20 ms⁻¹
- A Carnot engine takes heat from a reservoir at 627⁰C and rejects heat
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The radius of curvature of the convex face of a plano-convex lens is 12 cm
- Find the fundamental frequency of a closed pipe if the length of air column is 42m.
- A block is moving up an inclined plane of inclination 60° with velocity of 20 ms⁻¹
- A Carnot engine takes heat from a reservoir at 627⁰C and rejects heat
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
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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