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Corrective lens. A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
Abbe number. In optics and lens design, the Abbe number, also known as the V-number or constringence of a transparent material, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion. It is named after Ernst Abbe (1840–1905), the German physicist ...
The Texas Real Estate Commission(TREC) is the state agency that governs real estate practices in the state of Texas. The agency is headquartered at 1700 North Congress in Austin. [ 1 ] TREC is composed of nine members appointed by the Governor with the concurrence of the Texas Senate. The members are appointed for six-year terms, with the terms ...
Assuming a 5 percent total commission under the current model, here’s roughly what you could expect to pay based on the price your home sells for: Home’s sale price. Seller’s agent ...
How real estate commissions work. Home sellers are usually on the hook for their real estate agent’s commission as well as for paying the agent that represents the buyer. Brokers typically split ...
Chromatic aberration. Focal length of lens varies with the color of light. In optics, chromatic aberration ( CA ), also called chromatic distortion, color aberration, color fringing, or purple fringing, is a failure of a lens to focus all colors to the same point. [ 1][ 2] It is caused by dispersion: the refractive index of the lens elements ...
Hire a discount agent: A low-commission real estate agent will likely charge much less than a traditional agent would — usually 1 to 1.5 percent of your home’s sale price. (However, you might ...
Condenser (optics) A condenser is an optical lens that renders a divergent light beam from a point light source into a parallel or converging beam to illuminate an object to be imaged. Condensers are an essential part of any imaging device, such as microscopes, enlargers, slide projectors, and telescopes. The concept is applicable to all kinds ...