# P1.5.4 Wave Properties - Refraction

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• Created on: 30-04-14 14:36
What is refraction?
Refraction is the change of direction of waves when they travel across a boundary.
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Why does refraction take place?
Because waves change speed when they cross a boundary.
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What can we say about the refraction of a light ray when it goes through glass?
When a light ray refracts as it travels from air to glass, the angle of refraction is less than the angle of incidence.
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What can we say about the refraction of a light ray when it goes from glass into air?
When a light ray refracts as it travels from glass to air, the angle of refraction is more than the angle of incidence.
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Why does light split up into different colours when it passes through a triangular prism?
Because different wavelengths of light are refracted by different amounts
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## Other cards in this set

### Card 2

#### Front

Why does refraction take place?

#### Back

Because waves change speed when they cross a boundary.

### Card 3

#### Front

What can we say about the refraction of a light ray when it goes through glass?

### Card 4

#### Front

What can we say about the refraction of a light ray when it goes from glass into air?

### Card 5

#### Front

Why does light split up into different colours when it passes through a triangular prism?