Light and sound - reflection and refraction

1

What type of wave is a sound wave?

2

Which example proves light is faster than sound?

3

Which of these can happen to light waves?

4

What is the law of reflection?

5

What is dispersion?

6

Which colour of light is refracted the least?

7

What type of wave is a light wave?

8

How do we calculate refractive index?

9

In which does light travel the fastest?

10

Through which medium does sound travel the fastest?