Point A on the standing wave is the result of the constructive interference of two crests. The effect is the sum of the individual wave amplitudes at each site where more than one wave is present.
What is the interference of waves?
The result of two or more wave trains flowing in opposite directions on a crossing or coinciding pathways. This phenomenon is known as the interference of waves.
When two wave pulses are traveling along a string toward each other. They meet, and the phenomenon is occurring, known as interference.
The distance between two successive troughs or crests is known as the wavelength. The peak of the wave is the highest point known as crest.
Point A on the standing wave is the result of the constructive interference of two crests.
Hence, option A is correct.
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