Christiaan huygens light theory vs pigment
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Light and Optical Radiation
Terms of Radiations
As a physical term, electromagnetic radiation is a form of energy that propagates as both electrical and magnetic waves traveling in packets of energy called photons, or quanta. Their radiant energy is generally represented by electromagnetic spectrum in an orderly arrangement according to their wavelengths over a range from 10−16 to 105 meters (Figure 1). Electromagnetic radiation with variable wavelengths imparts different characteristics, the entire electromagnetic spectrum extends from very short-wavelength cosmic rays and gamma rays, through X-rays, optical radiation, and microwaves, down to very long-wavelength radio waves.
Optical radiation is electromagnetic radiation at wavelengths between the region of transition to X-rays (λ ≈ 1nm) and the region of transition to radio waves (λ ≈ 1mm). Optical radiation imparts optical characteristics, includes divisions of ultraviolet radiation, visible light and infrared radiation
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Light and Color
The three dimensions of Color-space
In the s, Isaac Newton began a series of experiments with sunlight and prisms. With these experiments he demonstrated that clear white sunlight was composed of all colors of a rainbow: the visual spectrum of light. He laid the path for others to experiment with color in a scientific manner. Gradually scientists agreed that colour is most conveniently described with three dimensions: the colour itself (hue), the saturation (for paint: the purity of the pigments) and the brightness (lightness, luminance, or energy of light). A value scale can be assigned to each of these dimensions. When the three axes are combined in a figure, a spatial three-dimensional figure (length, width and height) is created, hence the name colour space.
Over the centuries, dozens of mathematical forms of 3-D colour spaces have been presented: sphere, pyramid, cube, cylinder, cone, etc Below are a few examples:
The three primary colours o
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Opticks
Book by Isaac Newton
This article is about the book by Newton. For the subject in general, see Optics. For the computer program, see Opticks (software).
The first, , edition of Opticks: or, a treatise of the reflexions, refractions, inflexions and colours of light. | |
| Author | Isaac Newton |
|---|---|
| Language | English |
| Subject | Optics |
| Genre | Non-fiction |
Publication date | |
| Publication place | Great Britain |
| Media&#;type | |
| Text | Opticks at Wikisource |
Opticks: or, A Treatise of the Reflexions, Refractions, Inflexions and Colours of Light is a collection of three books by Isaac Newton that was published in English in (a scholarly Latin translation appeared in ).[1] The treatise analyzes the fundamental naturlig eller utan tillsats of light by means of the refraction of light with prisms and lenses, the diffraction of light bygd closely spaced sheets of glass, and the behaviour of color mixtures with spectral lights or pigment powders. Opticks was Newton's