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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: - An air bubble in a glass slab with refractive index 1.5 (near normal incidence)
- Current flows in semi-conductors through
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- In Young’s double slit experiment, the wavelength of the light used is doubled
- The moment of inertia of a rod about an axis through its centre and perpendicular
Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An air bubble in a glass slab with refractive index 1.5 (near normal incidence)
- Current flows in semi-conductors through
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
- In Young’s double slit experiment, the wavelength of the light used is doubled
- The moment of inertia of a rod about an axis through its centre and perpendicular
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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