Question on: SS3 Physics - Introduction to Waves

A wave requires a medium to propagate. Let's analyze the options:

• A. Liquid: Waves can travel through liquids (e.g., water waves).
• B. Solid: Waves can travel through solids (e.g., seismic waves).
• C. Air: Waves can travel through air (e.g., sound waves).
• D. Vacuum: A vacuum is devoid of matter. Waves, particularly mechanical waves, cannot travel through a vacuum because they require a medium to transfer energy.
• E. None of the Above: This is incorrect since one of the options is correct.

Therefore, the correct answer is that a wave cannot travel through a vacuum.