Two pulses travel in mutually opposite directions in a string with a speed of $2.5 cm/s$ as shown in the figure. Initially the pulses are $10cm$ apart. What will be the state of the string after two seconds
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(c) After two seconds each wave travel a distance of $2.5 × 2 = 5 cm$
i.e. the two pulses will meet in mutually opposite phase and hence the amplitude of resultant will be zero.
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