# Refractive index

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• Created by: blloob1
• Created on: 03-05-14 14:04
what is refraction
refraction is when waves change dirrection as they enter a different medium
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what causes refraction
the change in density from one medium to the other which changes the speed of the wave
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when waves slow down they bend towards what
The normal
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what happerns if a wave hits a boundry at 90 degrees i.e. along the normal
it will not change dirrection but it will slow down
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What happerns when light hits a different medium e.g. plastic or glass
some of the light will pas through to the new medium but some will be reflected
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For question 5's answer how much is relfected all depends on what
Angle of incidence
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what dose every transparent matirial have
A refractive index
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Refractive indexof a medium is the ratio of what
Speed of light in a vacuum to speed of light in that medium
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what is the refractive index equation
N=sin I/sin R
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in the refractive index equation what is I
Angle of incidence
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in the refractive index equation what is N
Refractive index
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in the refractive index equation what is R
Angle of refraction
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## Other cards in this set

### Card 2

#### Front

what causes refraction

#### Back

the change in density from one medium to the other which changes the speed of the wave

### Card 3

#### Front

when waves slow down they bend towards what

### Card 4

#### Front

what happerns if a wave hits a boundry at 90 degrees i.e. along the normal

### Card 5

#### Front

What happerns when light hits a different medium e.g. plastic or glass