Waves definitions

Across

• 1. The spreading of waves as they pass through a gap of a similar magnitude to their wavelength (11)
• 4. A material property that is equal to the ratio between the speed of light in a vacuum, and the speed of light in a given material (10, 5)
• 5. When two waves meet at the same point in space their displacements combine and the total displacement at that point becomes the sum of the individual displacements at that point (13)
• 7. The distance between two identical positions on two adjacent waves. It is commonly measured from peak to peak or trough to trough (10)
• 8. A position of minimum displacement in a stationary wave (5)
• 9. A wave's maximum displacement from its equilibrium position (9)
• 10. The number of waves that pass a point in a unit time period. It is the inverse of the time period (9)