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MAGIC SOUND WAVE ( RESONANCE )
Demonstrates forced vibrations and resonance. Apparatus consists of a set of 3 pair of thin steel strips of different lengths fixed to a wooden block. Metal strips of a pair are similar in colour and dimensions. Totally three 3 pairs of strips. When a strip of a one colour is plucked, only the other strip of the same colour starts vibrating where as the strips of the other colours remain stationary showing that maximum energy is transferred when resonance occurs.