30. What is (a) the frequency of an EM wave whose period is 1 ns? (b) What is its wavelength? (c) To what class ofEM waves does it belong? 10²106Increasing frequency, f (Hz):1041061Radio waves(low f, longa)AM10410²Decreasing wavelength,λ (m)108FM TV11010MicrowaveRadar10-210¹2700 nm10-41014Infrared10-6600 nm1016Ultra-violet10-8Visible light1018X rays10-10500 nm10201022Gamma (y) waves(high f, short 2)10-1210-14400 nm1024

Given data: Time period, T=1 ns=1×10-9 s

Answered: 30. What is (a) the frequency of an EM…

30. What is (a) the frequency of an EM wave whose period is 1 ns? (b) What is its wavelength? (c) To what class of EM waves does it belong?

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter5: Radiation And Spectra

Section: Chapter Questions

Problem 42E: What is the frequency of a red laser beam, with a wavelength of 670 nm, which your astronomy...

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Concept explainers

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.

Question

30. What is (a) the frequency of an EM wave whose period is 1 ns? (b) What is its wavelength? (c) To what class of
EM waves does it belong?

10²
106
Increasing frequency, f (Hz):
104
106
1
Radio waves
(low f, longa)
AM
104
10²
Decreasing wavelength,λ (m)
108
FM TV
1
1010
Microwave
Radar
10-2
10¹2
700 nm
10-4
1014
Infrared
10-6
600 nm
1016
Ultra-
violet
10-8
Visible light
1018
X rays
10-10
500 nm
1020
1022
Gamma (y) waves
(high f, short 2)
10-12
10-14
400 nm
1024

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