FlipIt for College Physics (Algebra Version - Six Months Access)
FlipIt for College Physics (Algebra Version - Six Months Access)
17th Edition
ISBN: 9781319032432
Author: Todd Ruskell
Publisher: W.H. Freeman & Co
Question
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Chapter 22, Problem 1QAP
To determine

(a)

Order of the electromagnetic waves from lowest to highest wavelength.

Expert Solution
Check Mark

Answer to Problem 1QAP

The electromagnetic waves from lowest to highest wavelength are Gamma ray, Ultraviolet ray, Red light, Infrared light and Microwaves.

Explanation of Solution

Given:

The given electromagnetic waves are microwaves, red light, ultraviolet light, infrared light and gamma rays.

The wavelength of the given electromagnetic waves has given in table below.

    Electromagnetic wavesWavelength (m)
    Microwave  1×103to3×103
    Red light  6.2×107to8.0×107
    Ultraviolet light  3×108to4×107
    Infrared light  8×107to3×105
    Gamma ray  6×1013to1×1010

Conclusion:

From the above table, the electromagnetic waves from lowest to highest wavelength are

Gamma ray, Ultraviolet ray, Red light, Infrared light and Microwaves.

To determine

(b)

The highest energy and lowest energy per photon out of the given electromagnetic waves.

Expert Solution
Check Mark

Answer to Problem 1QAP

The gamma ray has highest energy per photon and microwaves has lowest energy per photon.

Explanation of Solution

Introduction:

The energy per photon can be determined by Einstein's photo electric equation which is given by

  E=hcλ

Where ' E' is the energy, ' c' is the velocity of light, ' h' is plank constant and ' λ ' is the wavelength.

The energy is inversely proportional to the wavelength. As wavelength is more energy is less and vice versa.

The given electromagnetic waves are microwaves, red light, ultraviolet light, infrared light and gamma rays and the wavelength of the given electromagnetic waves has given in table below.

    Electromagnetic wavesWavelength (m)
    Microwave  1×103to3×103
    Red light  6.2×107to8.0×107
    Ultraviolet light  3×108to4×107
    Infrared light  8×107to3×105
    Gamma ray  6×1013to1×1010

So, in the given electromagnetic waves, the gamma ray has lowest wavelength. So, the energy per photon of gamma ray has highest value. The microwave has highest wave length so it has lowest energy per photon.

Conclusion:

Thus, the gamma ray has highest energy per photon and microwaves has lowest energy per photon.

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