300 000 km per second 30 000 km per second 3 million km per second 30 km per second
Refractive Index Dispersive Index Relational Index Reflective Index
Diffraction Interference Dispersion Diffusion
330 metres per second 1400 metres per second 30 metres per second 5000 metres per second
200 000 km per second 20 000 km per second 2 million km per second 20 km per second
Perspex Water Diamond Glass
Ultrasonic Waves Light Waves X-Rays Ultrafast Waves