3.3.17

Coloured Light

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Visible Light

Visible light is used to see the world around us.

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Visible light spectrum

  • Traditionally, we say that there are seven colours of light in the spectrum.
    • Red, Orange, Yellow, Green, Blue, Indigo and Violet.
  • Visible light is between infra-red radiation and ultraviolet light on the electromagnetic wave spectrum.
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Uses

  • We use visible light to see the world around us. We also use them in fibre optics.
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Explanation

  • We use visible light in fibre optics because visible light can be totally internally reflected.
  • This means that we can transmit signals (information) along optical fibres without the signals getting lost.

Jump to other topics

1Biology

1.1Cells, Tissues & Organs

1.2Reproduction & Variation

1.3Ecological Relationships & Classification

1.4Digestion & Nutrition

1.5Plants & Photosynthesis

1.6Biological Systems & Processes

2Chemistry

2.1Particles

2.2Chemical Reactions

2.3Atoms, Elements, Compounds

2.4The Periodic Table

2.5Materials & the Earth

2.6Reactivity

2.7Energetics

2.8Properties of Materials

3Physics

3.1Energy

3.2Forces & Motion

3.3Waves

3.4Electricity & Magnetism

3.5Matter

3.6Space Physics

4Disciplinary Knowledge

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