Light

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  • Created by: Eiocha
  • Created on: 15-05-16 16:27
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  • Light
    • Light travels in straight lines. If light could bend, there would be no shadows. Sunbeams and lasers all travel in straight lines.
    • Luminous objects are objects that give out their own light
      • All other objects are non-luminous and can only be seen if light bounces off them.
    • Reflection
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    • Refraction
      • Refraction is the change of direction in light. It causes straws to look bent in water and distorted views in a swimming pool
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      • Refracted- inside glass    Emergent- outside glass.
    • Dispersion
      • A prism splits a ray of white light into colour
      • Refraction is the bending of a wave when it enters a medium where its speed is different. The refraction of light when it passes from a fast medium to a slow medium bends the light ray toward the normal to the boundary between the two media.
      • Red light is refracted the least because it has the longest wave length
      • Violet light is refracted the most because it has the shortest wave length
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    • Coloured objects and coloured light
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      • Light absorbs or reflects the three primary colours- red, green and blue. For example, in red light, a red, white, or orange object would appear red, but a cyan object would appear black as it has no red in it.

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