Light waves travel in a vacuum, along the X−axis. Which of the following may represent the wave fronts?
A
x=c
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B
y=c
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C
z=c
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D
x+y+z=c
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Solution
The correct option is Ax=c As the light has a single direction the wavefront travel in the same direction with its plane perpendicular to the x axis. Thus the equation of the wavefront is x=c