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      • 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.

      2.1: Light as a Wave - Physics LibreTexts

  2. letstalkscience.ca › light-and-its-propertiesLight and Its Properties - Let's Talk Science

    • 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.

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    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 ...

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    Light travels very fast - at the speed of light in fact!
    Light travels as waves.
    Light travels in straight lines.

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  3. energywavetheory.com › explanations › what-is-lightWhat is Light? – EWT - Energy Wave Theory

    Light is a portion of the electromagnetic spectrum that is visible to humans. Although there are many types of waves, from radio waves to gamma rays, our Sun commonly produces the frequency in the electromagnetic spectrum that is visible light.

  4. www.sciencing.com › light-travel-4570255How Does Light Travel? - Sciencing

    Apr 24, 2017 · Light always takes the shortest path between a source and destination. A line drawn from the source to the destination, perpendicular to the wave-fronts, is called a ray. Far from the source, spherical wave fronts degenerate into a series of parallel lines moving in the direction of the ray.

  5. chem.libretexts.org › Courses › Knox_College1.2: The Wave Theory of Light - Chemistry LibreTexts

    Waves are characterized by several interrelated properties: wavelength (λ), the distance between successive waves; frequency (ν), the number of waves that pass a fixed point per unit time; speed (v), the rate at which the wave propagates through space; and amplitude, the magnitude of the oscillation about the mean position.

  6. physics.info › lightThe Nature of Light – The Physics Hypertextbook

    The excited electrons in a gas emit a discrete spectrum. The wavelength of a light wave is inversely proportional to its frequency. Light is often described by it's wavelength in a vacuum. Light ranges in wavelength from 400 nm on the violet end to 700 nm on the red end of the visible spectrum.

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  8. www.universalclass.com › articles › scienceLight as a Particle or a Wave - UniversalClass

    When light passes through a material, such as glass or water, the red light at one end of the spectrum travels faster than the violet light at the other end of the spectrum. This difference in speed causes a change in the direction of light when going from air to glass and from glass to air.