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8 Light

Year 8 light

Angle between an incoming light ray and the normal. angle of incidence
Angle between the light ray and the normal as it passes from one transparent material into another. angle of refraction
The boundary between two materials. interface
A diagram showing the passage of light rays. ray diagram
The change in direction when light goes from one transparent material to another. refraction
This means to ‘soak up’ or ‘take in’. If something absorbs light it soaks it up and does not let it back out. absorb
One of the three primary colours of light. (B) blue
Secondary colour made by mixing green and blue light (greeny-blue). cyan
The separating of the colours in light, for example when white light passes through a prism. dispersion
Something which only lets certain colours through and absorbs the rest. filter
One of the three primary colours of light. (G) green
Secondary colour made by mixing red and blue light (pinkish red). magenta
The three main colours which can make white light (red, green and blue). primary colours
A block of clear, colourless glass which is usually triangular. prism
One of the three primary colours of light. (R) red
The colours made when two primary colours mix. secondary colours
The seven colours of light. spectrum
To send along or pass through. transmit
Normal daylight, or the light from light bulbs. white light
Secondary colour made by mixing red and green light. yellow
Something which produces a narrow beam of light of one pure colour (short for Light Amplification by Stimulated Emission of Radiation). laser
Objects which create light. luminous sources
A beam of light drawn on diagrams as a straight line, and showing which way it is travelling. ray
A place where light cannot get to, because an opaque object is stopping the light. shadow
An object which creates something. source
Material which does not let light through. opaque
To bounce off something. reflect
Material through which a glow of light can be seen. translucent
To send along or pass through. transmit
Material which light can travel through. transparent
The angle between the normal and the ray of light hitting a mirror. angle of incidence
The angle between the normal and the ray of light leaving a mirror. angle of reflection
A picture which forms in a mirror, or on a screen, or is made by lenses. image
Light ray hitting a mirror. incident ray
An imaginary line at right angles to a mirror, where a ray of light hits the mirror. normal
Smooth and flat. plane
Smooth, flat mirror. plane mirror
A diagram showing the passage of light rays. ray diagram
Light bounces back from a surface instead of passing through it. reflect
Light bouncing back from a surface instead of passing through it. reflection
The ray of light bouncing off the mirror. reflected ray
When light rays bounce off something in all directions. scatter
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Popular Physics sets




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