Figure a shows two strings, the top one labeled before reflection and the bottom one labeled after reflection. The top string has a pulse labeled incident wave, which propagates to the right with velocity v subscript i. The bottom string has two pulses. The one on the left is labeled transmitted wave. This propagates to the right with velocity v subscript T. The wave on the left is labeled reflected wave. It moves to the left with velocity v subscript R. It has a smaller amplitude from the incident wave and is upside down. Figure b shows two strings, the top one labeled before reflection and the bottom one labeled after reflection. The top string has a pulse labeled incident wave, which propagates to the right with velocity v subscript i. The bottom string has two pulses. The one on the left is labeled transmitted wave and the one on the right is labeled reflected wave. Both are formed at the top of the string.