Question

Your friend is playing a song on a piano. Whenever your friend hits a certain key, the lamp on top of the piano rattles. Explain why the lamp rattles.

• A. The lamp rattles because of the occurring of interference
• B. The lamp rattles because of the occurring of diffraction
• C. The lamp rattles because of the occurring of resonance
• D. None of the above

Answer 1

Answer: (C)

The lamp rattles because of the occurring of resonance

This happens due to resonance (A phenomenon in which a vibrating system or external force drives another system to oscillate with a greater amplitude at a specific frequency). The lamp on top of the piano has a resonant frequency equal to one of the notes being played.