A string of length 0.4 m and mass 10^(-2...

A string of length `0.4 m` and mass `10^(-2)kg` is tightly clamped at its ends. The tension in the string is `1.6 N`. Identical wave pulses are produced at one end at equal intervals of time, `Deltat`. The minimum value of `Deltat` which allows constructive interference of successive pulse is

0.05 s

0.10 s

0.20 s

0.40 s

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