High light houses are built at various places in the sea from where signals are sent to the ships by sounding big sirens. Sometimes ships reach the silence zone, where the sound of sirens is not heard. Due to which property of sound waves are these silent areas created?

Silent zones where ships do not hear the sirens from lighthouses are created due to interference (Option B). Specifically, these silent areas are a result of destructive interference. Sound waves emitted by the sirens can travel through the air and water, and when these waves intersect, they can either reinforce each other (constructive interference) or cancel each other out (destructive interference). Destructive interference occurs when the crest of one sound wave aligns with the trough of another, effectively reducing the overall sound intensity to zero or near zero. This cancellation creates regions where the siren’s sound is not heard, known as silence zones. The occurrence of these zones depends on various factors, including the frequency of the sound waves, the distance between the sirens, and the environmental conditions affecting sound wave propagation. Understanding interference is crucial for designing effective auditory signaling systems to ensure that ships can reliably receive signals without encountering silent areas.