Question

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when waves encounter different conditions, such as a change in the temperature, humidity, or nature of the material, this division between two physical conditions is called a

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Explanation:

When waves encounter different physical conditions like changes in temperature, humidity, or material nature, the division between these two physical conditions is known as a boundary. In wave - related concepts, boundaries are crucial as they determine how waves behave (e.g., reflection, refraction) when moving from one medium or set of conditions to another.

Answer:

boundary