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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
- A hollow sphere of charge does not produce an electric field at any
- Water flows through a pipe. The area of cross-section at one place A₁=10 cm²,
- The velocity of radio-waves is 3×10⁵ km/s. The frequency corresponding to wavelength
- A certain current on passing through a galvanometer produces a deflection
- The approximate depth of an ocean is 2700 m. The compressibility of water is
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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