The type of wave that travels in one direction but has energy perpendicular to this direction is a transverse wave.

Here's a breakdown:

* Transverse Wave: The particles of the medium oscillate perpendicular to the direction the wave travels. Imagine shaking a rope up and down – the wave travels along the rope, but the rope itself moves up and down.

* Examples of Transverse Waves: Light waves, electromagnetic waves, and waves on a string are all examples of transverse waves.

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