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College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

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Section
BuyFindarrow_forward

College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

(a) Calculate the momentum of a photon having a wavelength of 2.50 μm . (b) Find the velocity of an electron having the same momentum. (c) What is the kinetic energy of the electron, and how does it compare with that of the photon?

To determine

(a)

The momentum of a photon having wavelength 2.50 μm .

Explanation

Given info:

  λ=2.50 μm

  h=6.63×1034 Js1

Formula used:

For momentum in photon, the relation between photon and wavelength is

  phλ

Calculation:

Value of wavelength is in micrometer convert it into m.

  λ=2.50×106 m

Now momentum of photon is

  p6

To determine

(b)

The velocity of an electron having the same momentum.

To determine

(c)

The kinetic energy of the electron, and compare it with that of the photon.

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