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Question

In a classroom experiment, a student tightly holds the prongs of a tuning fork after striking it and listens carefully. No sound is heard. Which explanation best fits this observation?

This question was previously asked in
RRB Technician 2026 Grade 3 Question Paper (7-Oct-2026) (Shift 3)
The correct answer is

The vibrations are absorbed by the hand

Sound is produced by vibrating objects. When a tuning fork is struck, its prongs vibrate back and forth, and these vibrations set the surrounding air particles vibrating, which carries the sound to our ears.

When the student holds the prongs tightly, the hand stops their movement and takes up the vibrational energy. With the prongs no longer vibrating, no sound waves are produced, so no sound is heard.

Air is the medium that carries sound, so it does not block it. The fork was struck and was producing sound until it was held, and being made of metal is exactly what lets a tuning fork vibrate and ring.

Hence, The vibrations are absorbed by the hand.

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