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8 Light
Year 8 light
| Question | Answer |
|---|---|
| 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 |
Created by:
Zigs.uk
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