# p4 Physics pg 98 & 99

?
When waves change direction as they enter a different medium
Refraction
1 of 10
The change in what causes the wavelength to change
speed
2 of 10
Waves travel at different speeds in substances which have different what?
densities
3 of 10
A wave changes speed when it crosses what?
boundary
4 of 10
When the speed increases the wave bends ____ from the normal
away
5 of 10
The refractive index is a measure of the amount of bending - the higher the refractive index, the more the light ___
bends
6 of 10
Light slows down a lot in glass, so the refractive index of the glass is ___
high
7 of 10
Refractive index explains ___
dispersion
8 of 10
Total internal reflection only happens when light travel from a more dense medium with a higher refractive index to a less dense medium with a lower refractive index e.g ___
from glass to water
9 of 10
Different colours of light are refracted by different amounts, because they travel at slightly different speeds in any given __
medium
10 of 10

## Other cards in this set

### Card 2

#### Front

The change in what causes the wavelength to change

speed

### Card 3

#### Front

Waves travel at different speeds in substances which have different what?

### Card 4

#### Front

A wave changes speed when it crosses what?

### Card 5

#### Front

When the speed increases the wave bends ____ from the normal