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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsDe Broglie & Matter WavesHard2 minPYQ_2021

PhysicsHardsingle choice

A photon has wavelength $3 nm$ , then its momentum and energy respectively will be $[h = 6.63 \times 1 0^{- 34} Js, c = velocity of light = 3 \times 1 0^{8} m / s]$

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Answer:

Solution:

Momentum, $p = \frac{h}{λ} = \frac{6.63 \times 1 0 ^{- 34}}{3 \times 1 0 ^{- 9}} = 2.21 \times 1 0^{- 25} kg ms^{- 1}$ Energy, $E = \frac{hc}{λ} = pc = 2.21 \times 1 0^{- 25} \times 3 \times 1 0^{8} = 6.63 \times 1 0^{- 17} J$

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

⏱ 2mℹ️ Source: PYQ_2021

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