Which type of wave can travel through a vacuum?

Wave propagation: Waves can travel through different mediums. Some waves, like sound and water waves, require a medium to propagate.

Vacuum travel: Electromagnetic waves, including radio waves, can travel through a vacuum. This is because they do not require a medium; they propagate through the oscillation of electric and magnetic fields.

Conclusion: The type of wave that can travel through a vacuum is a radio wave.

References: Integrated Physical Sciences materials on wave propagation, properties of electromagnetic waves, differences between mechanical and electromagnetic waves.