Chapter 30, Problem 68PE

### College Physics

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

Chapter
Section

### College Physics

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

# Unreasonable Results(a) What voltage must be applied to an X-ray tube to obtain 0.0100-fm-wavelength X-rays for use in exploring the details of nuclei? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?

To determine

(a)

What voltage must be applied to an X-ray tube to obtain0.0100fm wavelength X-rays for use in exploring the details of nuclei?

Explanation

Given Data:

Given that0.0100fm wavelength X-rays are used in exploring the details of nuclei

Formula Used:

Energy and applied voltage are related as

E=qV

WhereE= Energy

q= Charge

V= Applied voltage

Also, Energy is given as

E=hcÎ»

WhereE= Energy

h= Planck's Constant

c= Speed of light

Î»= Wavelength

Calculation:

We haveE=qV

andE=hcÎ»

Equating the above two equations, we have

qV=hcÎ»

V=hcqÎ»

We haveh=6.626Ã—10âˆ’34J.s

â€ƒâ€ƒc=3Ã—108m/s

â€ƒâ€ƒÎ»=0

To determine

(b)

To determine

(c)

Which assumptions are unreasonable or inconsistent?

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