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Oct 17, 2014 · Light. Light is electromagnetic radiation that has properties of waves. The electromagnetic spectrum can be divided into several bands based on the wavelength. As we have discussed before, visible light represents a narrow group of wavelengths between about 380 nm and 730 nm.
Shortest x-rays and cosmic rays destroy molecules. Energy in visible light is absorbed without damage to cells. Special molecules (visual pigments) make use of changes in electron orbital states. Absorption by water depends on wavelength.
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The spectrum of light is the primary link between optics and atomic physics and other sciences such as astrophysics. The basis for almost all instruments for spectral analysis is, again, interference.
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- Properties of Light
- 1 Introduction
- 2 Coherence
- 4 Material Properties for Optical Components
- 6.1 Retardation Plates
- 1⁄4 0 7 Summary
In order to understand the physical properties, design, and fabrication of any display Abstract: technology, it is essential to have a good appreciation of the basic physics involved in the light sources and materials used in their construction. This does not mean that to be a display engineer you need an in-depth knowledge of Maxwell’s equations, ...
Light is a very complex notion which stems from the general properties of electromagnetic radiation. However, to use light in applications such as displays, it is often only the simplest concepts of propagation that are required. The basic theory of light propagation stems from complicated mathematical theories such as Maxwell’s equations [1] which...
Optical coherence is difficult to define as there are many types and unusual definitions. If we assume that light has a basic wave property as described above, then we are assuming that light is fully coherent. Unfortunately such light sources are very rare and even the highest quality laser light source will have some degree of unpredictability. T...
The job of the optical component design engineer is to marry together many different specifications along with the packaging and environmental specifications in order to create a commercially cost-effective component. Two very important considerations are the choice of materials used to make the waveguide and the fabrication methods employed. Radio...
Some crystals such as sodium chloride have a cubic molecular structure. When light passes through these structures it sees no preferred direction and is relatively unaffected. If the crystal has a structure such as hexagonal or triagonal, different directions of light will see very different crystalline structures. This effect is called birefringen...
A display engineer does not need an in-depth knowledge of Maxwell’s equations, but rather to understand the fundamental physical properties of light that lead to its control, propagation, and modulation. Key to this is an understanding of the basic wave properties of light and how this leads to an energy transfer, and properties such as polarizatio...
Light is a form of radiant energy or energy that travels in waves. Since Greek times, scientists have debated the nature of light. Physicists now recognize that light sometimes behaves like waves and, at other times, like particles. When moving from place to place, light acts like a system of waves.
What is light? Light is a form of energy Light, like sound and heat, is a form of energy. Our understanding of light starts with what light does and what its properties are (Figure 10.1). We know that: • light travels extremely fast and over long distances; • light carries energy and information; • light travels in straight lines;
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\light particles" have energy that consists of two components: the kinetic energy K, and potential energy U. The total particle energy is conserved, meaning that K+ U = const. However, the potential energy of the light particle depends on the medium the light passes through: the energy U is di erent in air, di erent in water, di erent in glass ...
