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Electromagnetic Waves Lab Report

770 Words4 Pages

Abstract :
Electromagnetic waves were initially postulated by James Clerk Maxwell. Maxwell’s equation states that a few types of charges and currents initiate a local type of electromagnetic field near them which does not includes the behavior of EMR. According to Maxwell’s equation, a random electric field is related with a magnetic field that keeps varying. Similarly, a random magnetic field is related with changes over time in electric field. In an electromagnetic wave, any changes in electric field have always been accompanied by a wave in magnetic field in a specific direction, and vice versa. This paper basically describes
• What is an electromagnetic wave ?
• How to find the characteristic of electromagnetic wave ?
• How to create …show more content…

In electromagnetic waves the lowest frequency observed is 30 hertz and the highest frequency waves are gamma rays of 10^19 hertz.

According to the diagram given in assignment :
Frequency : f = 1/Time = 0.166Hz

Velocity:

The electromagnetic wave holds a velocity that is approximately 186,000 miles per second in a vaccum, similar to the speed of light. These waves slow down slightly when they pass through matter.

Speed

The speed implies to how fast an object is moving and is generally depicted as distance travelled per time of the travel. Likewise, the speed of the wave is distance travelled by specific point on wave (for example: crest) in a specific interval of time. In equation form,
Speed = Distance/time

As the period is reciprocal of frequency, the statement 1/f can be replaced into the above equation.Redefining the equation gives a new equation in the form of :

Speed = Wavelength • Frequency
C = 12 * 0.166 m/s

Matlab code for making wave movie: c = 50; T = 2*pi; L = 100; %x-axis x=-2*pi:0.01:2*pi; for n = 1:(T*L+1)

%movie with one wave traveling. plot(x, .5*(sin(x+c*(n-1)/L) + sin(x-c*(n-1)/L)), 'c') hold

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