Neha ties two plastic spoons to the ends of a cotton thread, holds the thread ends near her ears, and lets a…
Neha ties two plastic spoons to the ends of a cotton thread, holds the thread ends near her ears, and lets a friend strike the spoons together. She hears a clear, loud sound. Why is the sound clearer through the thread than through the air?
Cotton thread creates an electric charge that amplifies sound
Sound travels more efficiently through solids than through gases
Air absorbs sound waves and turns them into light
Thread prevents sound waves from scattering in the room
Solution
Solids propagate sound vibrations more effectively and with less loss of energy compared to gases like air.