16.5 Exercise 2

A string of a length of 2.00 m with a linear mass density of $\mu = 0.006 \text{kg}/\text{m}$ is attached to the end of a 2.00-m-long string with a linear mass density of $\mu = 0.012 \text{kg}/\text{m} .$ The free end of the higher-density string is fixed to the wall, and a student holds the free end of the low-density string, keeping the tension constant in both strings. The student sends a pulse down the string. Describe what happens at the interface between the two strings.