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Forums
Physics
Classical Physics
Optics
Constructive interference of harmonic electromagnetic waves
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[QUOTE="sophiecentaur, post: 6654474, member: 199289"] The word "superposition" doesn't imply anything about [I]interaction[/I] of the two waves. In a linear medium the displacements at any time and place have no effect on each other. It's only when you actually measure or observe the displacement due to the two waves that you can get a stationary interference effect. There are many places and times for any two waves where the sum is zero, momentarily. A half way house can be reached with two waves of very nearly the same frequency, when the locations of nulls (fringes) slowly move through space and the resultant, measured in one point in space, will be a 'beat' in time at a frequency which is the difference between the two wave frequencies. Exactly the same thing is happening for any number of waves. [/QUOTE]
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Forums
Physics
Classical Physics
Optics
Constructive interference of harmonic electromagnetic waves
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