PCN NDT Ultrasonic Testing Level 2 Exam Practice Questions - PCN NDT Ultrasonic Testing Level 2 Exam

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What happens to an ultrasonic wave when it encounters an interface between two materials with significantly different acoustic impedances?

The wave passes through unimpeded. The wave is entirely absorbed by the interface. A significant portion of the wave is reflected. The wave's frequency dramatically increases.

Correct Answer:

A significant portion of the wave is reflected.

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