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College Physics

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

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BuyFindarrow_forward

College Physics

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

Unreasonable Results

(a) What is the binding energy of electrons to a material from which 4.00-eV electrons are ejected by 400-nm EM radiation? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?

To determine

(a)

The binding energy of the electrons

Explanation

Given:

Wavelength of light =λ=400 nm = 400 × 109 m

Frequency of light =f

Binding energy of metal =BE=?

Binding energy =BE

Kinetic energy of ejected electrons =KE = 4 eV

Formula Used:

Frequency is given as

  f=cλ

Energy of light is given as

  E=hf

Kinetic energy of the ejected electrons is given as

  KE=hfBE

Calculation:

Frequency is given as

  f=cλ

Inserting the values

  f=(3 &#

To determine

(b)

What is unreasonable about the result in part (a)

To determine

(c)

Which assumption is unreasonable or inconsistent

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