A transverse wave is characterized by oscillations that are perpendicular to the direction of wave propagation.
From the options provided:
- A: X-Ray - X-rays are a type of electromagnetic radiation and are classified as transverse waves.
- B: Sound Wave - Sound waves are longitudinal waves, where the oscillations occur in the same direction as the wave travels.
- C: Shock Wave - Shock waves can be either longitudinal or transverse, but they are often associated with pressure waves, making them primarily longitudinal in most contexts.
- D: Sonic Boom - A sonic boom is a type of shock wave specifically associated with the speed of sound and is also a longitudinal wave.
Therefore, the correct answer is A: X-Ray.
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