Of the following choices, refraction requires which of the following factors? media velocity differences medium 1 velocity > medium 2 velocity acoustic impedance differences perpendicular incidence
Question
Of the following choices, refraction requires which of the following factors? media velocity differences medium 1 velocity > medium 2 velocity acoustic impedance differences perpendicular incidence
Solution
Refraction requires acoustic impedance differences. This is because refraction is the change in direction of a wave due to a change in its transmission medium. This change in direction is caused by the wave moving from one medium to another with different acoustic impedance. Acoustic impedance is the measure of the resistance of a medium to the propagation of sound waves. Therefore, for refraction to occur, there must be a difference in acoustic impedance between the two media.
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