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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
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
- In the Young’s modulus experiment, if length of wire and radius both are doubled,
- Two slits in Young’s experiment have widths in the ratio 1:25. The ratio of intensity
- The wavelength of light emitted from second orbit to first orbit in a hydrogen atom is
- A beam of light contains two wavelengths 6500Å and 5200Å.
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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