COHERENT AND INCOHERENT ADDITION OF WAVES

Опубликовано: 05 Март 2025
на канале: 7activestudio

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Coherence was originally conceived in connection with Thomas Young's double-slit experiment in optics but is now used in any field that involves waves, such as acoustics,electrical engineering, neuroscience, and quantum mechanics. The property of coherence is the basis for commercial applications such as holography, the Sagnac gyroscope, radio antenna arrays, optical coherence tomography and telescope interferometers .

Coherent and Incoherent Waves

Two waves produce the interference pattern only if they originate from coherent sources. The process of light emission from ordinary sources such as the sun, a candle, an electric bulb, is such that one to use special techniques to get the coherent sources. In order to obtain the fine interference pattern the path difference between the two waves originating from the sources should be very small. In practice the path difference should not be exceed a few centimeters to observe a good interference pattern.