Wave Motion

🎯 Class Objective:

The student connects oscillatory motion to uniform circular motion by mapping correspondences between variables, applies Hooke’s law and basic energy relationships, and creates analogies between spring–mass and pendulum systems to explain simple harmonic motion.

🌊Wave Motion Activities

🌟 A) Identify the Wave

Classify each as transverse / longitudinal and mechanical / electromagnetic:

1. Sound in air
   
   

2. Light
   
   

3. Wave on a rope
   
   

4. Seismic P-wave
   
   

5. Seismic S-wave

📐 B) Wave Equation Practice

Use v=λf.

1. A wave has f=12 Hz and λ=0.80 m. Find v.
   
   

2. A wave travels at v=340 m/s with f=170 Hz. Find λ.
   
   

3. If frequency doubles and speed stays constant, wavelength:
   
   

• doubles / halves / stays the same
  
  

🔊 C) Energy & Amplitude (Reasoning)

1. Two waves travel in the same medium. Wave A has twice the amplitude of Wave B.
   Which carries more energy? Explain in one sentence.
   
   

2. True/False:
   
   

• Increasing amplitude changes wave speed in the same medium.
  
  

• Increasing frequency changes wave speed in the same medium.
  
  

🌍 D) Seismic Waves (Applied)

1. Explain why S-waves do not travel through liquids.
   
   

🪞 E) Wave Phenomena (Choose & Justify)

Match each phenomenon to the best example:

• reflection
  
  

• refraction
  
  

• diffraction
  
  

• interference
  
  

Examples:
A) echo in a canyon
B) bending around a doorway
C) rainbow / lens bending light
D) two speakers creating loud/quiet spots