1. Interference
When waves meet, a new wave is generated in a process called interference.
Interference may create a pattern that looks jumbled
Interference may create a pattern where it looks like the wave stands in place at just the right frequency.
Aka the reflected wave has the same wavelength, Amplitude, and velocity of the initial wave.

2. - I can draw standing waves - So I can describe the relationship between wavelength and frequency - I am successful when I complete the worksheet.

3. Special Interference Cases
1. Standing Waves on a String
2. Standing Wave in a Pipe with One Closed End
3. Standing Wave in a Pipe with Open Ends.

4. Standing Wave on String Java Demo

5. Standing Waves on String
Nodes – Displacement of interfering waves are always equal and opposite.
Antinodes – Locations of greatest constructive interference.
The HIGHER the FREQUENCY the GREATER the number of STANDING WAVES

7. Standing Waves on a String
n is the number of Peaks

8. Standing Wave in Closed Pipe Java Demo

9. At the closed end of an air column, air is not free to undergo movement and thus is forced into assuming the nodal positions of the standing wave pattern.
Air at the closed end of an air column is still.
Conversely, air is free to undergo its back-and-forth longitudinal vibration at the open end of an air column.
And as such, the standing wave patterns will depict vibrational antinodes at the open ends of air columns.

13. Standing Wave in Open Pipe Java Demo

16. Harmonics
The fundamental frequency is the lowest possible frequency that any instrument can play; it is sometimes referred to as the first harmonic of the instrument.
The second harmonic of any instrument always has a frequency that is twice the frequency of the first harmonic.
The third harmonic of any instrument always has a frequency that is three times the frequency of the first harmonic.
The fourth harmonic of any instrument always has a frequency that is four times the frequency of the first harmonic.