Complex Representation of Moving EM Waves

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SUMMARY

The discussion focuses on the complex representation of electromagnetic (EM) waves moving in different directions. The equations presented are E1 = E Im(exp[i*(wt + kx)]) for waves moving in the negative x-axis and E2 = E Im(exp[i*(wt - kx - θ)]) for waves moving to the right. The participant questions the necessity of including a negative imaginary unit (-i) for E1. The consensus emphasizes that using complex notation simplifies the representation of both amplitude and phase without needing separate constants.

PREREQUISITES
  • Understanding of wave equations in physics
  • Familiarity with complex numbers and their applications in wave mechanics
  • Knowledge of electromagnetic wave properties
  • Basic grasp of phase shifts in wave functions
NEXT STEPS
  • Study the derivation of wave functions in complex form
  • Learn about the implications of phase shifts in electromagnetic waves
  • Explore the use of complex exponentials in signal processing
  • Investigate the relationship between amplitude and phase in wave mechanics
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Students of physics, electrical engineers, and anyone interested in the mathematical representation of electromagnetic waves.

rsaad
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Homework Statement



Moving in negative x-axis: E1 = E sin(wt + kx)
Moving in right axis: E2 = Esin(wt-kx-θ) moving to right

write complex representation


The Attempt at a Solution



E1= E Im(exp[i*(wt+kx)])
E2= E Im(exp[i*(wt-kx-θ)])

are these correct or do I have to take into account the -i^ for moving to left in E1?
 
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As I understand it, the advantage of writing the wave function in complex form is that a single complex constant encapsulates both the amplitude and the phase. So you should get equations without a separate constant for phase. See e.g. http://farside.ph.utexas.edu/teaching/315/Waves/node72.html
 

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