Suppose you have 4 segments of vibrating string. You gently though firmly grab t

Question

Suppose you have 4 segments of vibrating string. You gently though firmly grab the string at the central node and hold it steadily (e.g. with a paper clip). What will happen? The string between your hand and the vibrator will cease to hold a standing wave The string between your hand and the vibrator will have 4 segments of standing wave The string between your hand and the vibrator will have 2 segments of standing wave The string between your hand and the masses will cease to hold a standing wave The amplitude of the segments in the string between your hand and the mass will increase None of these

Explanation / Answer

If you gently shake (vibrate) the end of a string up and down, a wave will travel to the right (R), hit the fixed end,
and reflect back to the left (L). If you shake at just the right “resonance” frequency - one that matches one of the
natural frequencies of the string - then the two travelingwaves (R and L) will combine to produce a standing
wave of large amplitude: R + L = STANDING WAVE.

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