# Science Unit 1

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• Created by: Charlotte
• Created on: 14-05-14 14:02
What is the amplitude?
the distance from the middle line to the top of the wave (crest)
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What is the wavelength?
length of a full cycle of the wave (from crest to crest)
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What is the frequency of a wave?/
the number of complete cycles or oscillations passing a certain point per second.
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What is the frequency of a wave measured in?
hertz (Hz) 1 hz is one wave per second.
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How do waves travel?
Waves travel in straight lines through whatever they are travelling through. When they meet an obstacle or a new material their direction changes. This can happen by reflection, refraction and diffraction.
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What is reflection?
It is what helps us see obects.When a beam of light reflects of an uneven surface, it relects of at different angles. Reflects off an even surface, same angle.
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Law of reflection?
Angle of INCIDENCE = Angle of REFLECTION
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What is total internal reflection?
happens when the light ray travels through a dense material towards a less dense substance. if the angle of incidence is big enough (bigger than critical angle) the ray doesnt come out at all, but reflects back into the material.
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## Other cards in this set

### Card 2

#### Front

What is the wavelength?

#### Back

length of a full cycle of the wave (from crest to crest)

### Card 3

#### Front

What is the frequency of a wave?/

### Card 4

#### Front

What is the frequency of a wave measured in?

### Card 5

#### Front

How do waves travel?