Definitions GCSE Watch

Maariyah826
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Hi can someone give me the correct definitions of the following key words (Please make them as easy to understand as possible!)

Refraction
Reflection
Diffraction
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Maariyah826
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Anyone?!
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Joinedup
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of waves...

see the glossary here http://www.bbc.co.uk/education/guides/zdwnb9q/revision

reflection: There is a reflection when waves bounce off a surface.

refraction: Process by which a wave changes in speed and sometimes direction upon entering a denser or less dense medium. For example, a light ray changes direction when refracted by a lens.

diffraction: The spreading out of waves when they pass through a gap or around an obstacle.

reflection also has a slightly different meaning in maths where you might transform a graph into it's mirror image.
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morgan8002
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(Original post by Joinedup)
reflection also has a slightly different meaning in maths where you might transform a graph into it's mirror image.
It's not just for graphs. Reflections are defined on geometric spaces.
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