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The text in the screen reads, the travelling wave shown in red is given by y equals 5 cosine left parenthesis pi t minus pi x right parenthesis volts. Thus, its frequency is 0.5 hertz, its wavelength is 2 centimeters and its reference phase angle phi sub 0 with t equals 0 defined as the time the animation is started. For comparison, you can generate and display in green a waveform given by y equals 5 e to the negative power of start expression negative alpha x end expression cosine left parenthesis 2 pi f t minus start fraction 2 pi x over lambda end fraction right parenthesis volts by specifying its attributes in the input panel.

Input for green wave,

Frequency, r equals 0.5 hertz. Wavelength, lambda equals 2 centimeters. Attenuation, lambda equals 0.1932.

The output is as follow:

The x axis displays the values from 0 to 6 with an increment of 0.5, and the y axis displays the values from negative 5 to 5. The red sinusoidal wave for phi sub 0 equals 0 degrees pass from (0, 5), (0.5, 0), (1, 5), (1.5, 0), (2, 5), (2.5, 0), (3, negative 3), (3.5, 0), (4, 5), (4.5, 0), and (5.5, 0). The green sinusoidal wave for phi sub 0 equals 0 degrees pass from (0, 5), (0.5, 0), (1, 4), (2, 3), (2.5, 0), (3, 3), (3.5, 0), (4, 2), (4.5, 0), (5, negative 2), and (5.5, 0). All values are estimated.