Question

in an experiment, sound waves are played near a guitar string. the string starts to vibrate even though it is not touched. what phenomenon is occurring?
refraction
diffraction
reflection
resonance

Explanation:

Resonance occurs when an object vibrates in response to another vibrating object at the same frequency. In this case, the sound waves (vibrating at a certain frequency) cause the guitar string (which has a natural frequency matching that of the sound waves) to vibrate.

• Refraction is the bending of waves as they pass from one medium to another.
• Diffraction is the bending of waves around obstacles or through openings.
• Reflection is the bouncing back of waves when they hit a surface.

Answer:

resonance