reflection of waves
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15 Terms
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What a wave can do at the boundary between different materials
The wave can be reflected, refracted, transmitted or absorbed
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Reflection
When a wave meets meets the boundary between two different materials and bounces off
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Echo
The name given to a reflected sound wave
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Law of reflection
The angle of incidence is equal to the angle of reflection (measured from the normal line)
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Incident ray
The incoming ray that hits the smooth surface
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Angle of incidence
The angle between the incident ray and the normal line
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Reflected ray
The ray after it has been reflected from the smooth surface
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Angle of reflection
The angle between the reflected ray and the normal line
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Normal line
An imaginary line at right angles to the boundary between two different materials where all angles are measured from
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Specular reflection
When light is reflected from a smooth surface in a single direction e.g. from a plane mirror
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Plane mirror
A flat mirror that allows an image to be seen
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Image formed in a plane mirror
The image formed is upright and virtual
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Virtual image
An image that forms at a position where light rays appear to come from but do not actually come from e.g. the image in a plane mirror
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Diffuse reflection
When light is reflected from a rough surface and scatters in many directions
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Image formed from a diffuse reflection
A image formed is distorted image if it forms at all
Note 
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