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