On pages 145 and 146 we investigate how ripple speed depends on frequency and depth of water.

Pages 147 and 148 are about reflection and refraction of waves in a ripple tank.

On pages 149 and 150 we figure out Snell’s law of refraction.

Pages 151, 152, and 153 are about refraction of light, leading to an explanation of rainbows.

Sample Refraction Problem with solution: