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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsDe Broglie & Matter WavesEasy2 minPYQ_2020

PhysicsEasysingle choice

If the mass of neutron $= 1.7 \times 10^{- 27} kg$ , then the de-Broglie wavelength of neutron of energy $3 eV$ is $(h = 6.6 \times 10^{- 34} J - s)$

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Answer:

Solution:

Given $E = 3 e V = 3 \times 1.6 \times 10^{- 19}$ J

We know that $λ = \frac{h}{\sqrt{2 m E}}$

$= \frac{6.6 \times 10^{- 34}}{\sqrt{2 \times 1.7 \times 10^{- 27} \times 3 \times 1.6 \times 10^{- 19}}} = 1.65 \times 10^{- 11} m$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:De Broglie & Matter Waves

⏱ 2mℹ️ Source: PYQ_2020

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