🎯 WALT (We Are Learning To):

• Identify nodes and antinodes in open tube standing waves

• Calculate frequencies using the formula f_n = n × v ÷ 2L

• Understand the first three harmonics in open tubes

Success Criteria:

✓ I can label nodes (N) and antinodes (A) on wave diagrams

✓ I can use the frequency formula correctly

✓ I can explain how harmonics relate to tube length

📊 Part 1: Understanding Standing Waves

Answer: _______ nodes

🔢 Part 2: Calculations

🎓 Differentiation Support

For dyslexia-friendly reading:

• Key formula: f = n × v ÷ 2L (frequency = harmonic number × wave speed ÷ 2 × tube length)

• Remember: Open tubes have antinodes at BOTH ends

Support strategies:

• Use coloured pens to mark nodes and antinodes

• Work with a partner for calculations

• Draw wave patterns before attempting calculations

Extension activities:

• Research how wind instruments use open tube harmonics

• Compare open tube frequencies with closed tube frequencies

• Investigate how tube diameter affects sound quality