Which of the following properties of waves is exclusive to transverse waves?

1. Analyze the question You are asked which wave property happens only in transverse waves, not in longitudinal waves such as sound.

2. Explain the concept

• Transverse waves vibrate perpendicular to the direction the wave travels (light, water ripples, waves on a string).
• Longitudinal waves vibrate parallel to the direction of travel (sound, compressions and rarefactions in a spring).

3. Check each option

• A. Reflection: Both transverse and longitudinal waves reflect. Sound echoes are an example. Not exclusive.
• B. Interference: Both types can superpose and interfere. Sound shows beats and loud or quiet spots. Not exclusive.
• C. Diffraction: Both types bend around obstacles or spread through gaps. Sound bending around a corner is an example. Not exclusive.
• D. Polarization: This restricts the vibrations to a single plane. It only makes sense if the vibrations are perpendicular to the direction of travel and can point in different directions. Longitudinal waves vibrate only along the direction of travel, so there is no sideways direction to filter. Polarization is therefore exclusive to transverse waves.

4. Answer The correct option is D. polarization.

5. Exam tip Remember: "Polarization = Perpendicular." If a question asks for proof that light is a transverse wave, the answer is polarization. Reflection, refraction, diffraction and interference are shared by all waves.