Question

question 20 of 28
which kind of wave is generated by a plucked guitar string as the molecules of air around it begin to vibrate?
a. transverse
b. longitudinal
c. surface
d. electromagnetic

Explanation:

• Transverse waves have particle motion perpendicular to wave direction (e.g., guitar string itself). But the question is about air molecules.
• Longitudinal waves have particle motion parallel to wave direction. Sound (from vibrating guitar - string - induced air molecule vibration) is a longitudinal wave.
• Surface waves occur at interfaces (not relevant here).
• Electromagnetic waves don't need a medium (air is a medium here, so not electromagnetic).

Answer:

B. Longitudinal