�WHAT IS LIGHT?
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¿WHAT IS LIGHT?
Description of light’s natural properties. Its relationship with colour. Different behaviours in air or water. Sources of light. Electromagnetic waves. Speed of light. Summary.
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INTRODUCTION
- Definition of Light
- As far back as the 17th Century, scientists could not agree upon the nature of light.
- There are many questions we can ask ourselves about light.
THE NATURE OF LIGHT
- How is light transmitted? The photons.
- The light and the electromagnetic waves.
- The eye distinguises colours
- Isaac Newton was the first person to discover that white light is really made up of
different colours.
- The colours. The different wavelengths.
ACCESS TO LIGHT SOURCES
- Light sources
- The Sun
- Light bulbs – how do they function?
- Paraffin lamps
- The photons
- Colours and spectra
THE DIFFUSION OF LIGHT
- How is light normally diffused?
- Light can also pass through gases
- Light can also pass through water
- Performance of light while passing through different objects.
- The lenses of telescopes
- Translucent bodies
SPEED
- In the old days, it was thought that light was diffused instantly.
- The speed of light
- Different times of the speed of light
SUMMARY |
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