Wave characteristics part 2

As the two pulses meet the result (sum pulse) can be understood by superposition principle. The interference is

• constructive, if the pulses are in phase
• destructive, if the pulses are in opposite phase.

At the boundary between the two media, the pulse is both reflected and refracted (some of the pulse energy is absorped in the end).

1. Reflection

• Phase change (to opposite) takes place, if the pulse is reflected from fixed end
• No phase change, if the pulse is reflected from free end.

2. Refraction

• Take a look to speed, wavelength, phase and amplitude...