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  1. They discovered that light from any source, whether a candle or a star, is composed of a combination of wavelengths depending on what atoms and molecules are emitting the light. This science (spectroscopy) allows astronomers to determine what elements must be present on the surface of a given star.

  2. Light is a transverse, electromagnetic wave that can be seen by the typical human. The wave nature of light was first illustrated through experiments on diffraction and interference. Like all electromagnetic waves, light can travel through a vacuum. The transverse nature of light can be demonstrated through polarization.

    • Waves of Light
    • Colours of Light
    • To Summarise

    These different colours of light have different wavelengths and frequencies. Red light has the longest wavelength, and the lowest frequency of the visible spectrum. Violet has the shortest wavelength, and the highest frequency of the visible spectrum.

    Mixing coloured materials, such as paint, is an example of subtractive colour mixing. Red paint appears red to us because when white light strikes it, the red pigments reflect the red wavelengths of light and absorball of the wavelengths. This reflected light is what is seen by our eyes. The same is true for all of the other colours. So what about ...

    Light travels very fast - at the speed of light in fact!
    Light travels as waves.
    Light travels in straight lines.
  3. We know that light is a wave based on how it behaves – it exhibits the same properties of other waves we have examined – it interferes with itself, it follows an inverse-square law for intensity (brightness), and so on.

  4. Nov 14, 2024 · photon. speed of light. On the Web: Tulane University - Department of Earth and Environmental Sciences - Light (Oct. 21, 2024) (Show more) Top Questions. What is light in physics? What is the speed of light? What is a rainbow? Why is light important for life on Earth? What is colour's relation to light?

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  5. Light Waves - BBC Bitesize. What are light waves? Light is a type of electromagnetic radiation that can be detected by the eye. It travels as a transverse wave. Unlike a sound waves,...

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  7. When we’re thinking of light as being made of particles, these particles are called “photons”. Photons have no mass, and each one carries a specific amount of energy. Meanwhile, when we think...