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David D. Burns (born September 19, 1942) is an American psychiatrist and adjunct professor emeritus in the Department of Psychiatry and Behavioral Sciences at the Stanford University School of Medicine. He is the author of bestselling books such as Feeling Good: The New Mood Therapy, The Feeling Good Handbook and Feeling Great: The ...
Optical glass refers to a quality of glass suitable for the manufacture of optical systems such as optical lenses, prisms or mirrors.Unlike window glass or crystal, whose formula is adapted to the desired aesthetic effect, optical glass contains additives designed to modify certain optical or mechanical properties of the glass: refractive index, dispersion, transmittance, thermal expansion and ...
David Burns (or Burnsy) (born 26 April 1959 in Glasgow, Scotland) is a British radio presenter working for the BBC. He is best known for his sports commentary, analysis and discussion on BBC Radio Humberside. Biography. Up until June 2023, he was the presenter of the mid-morning programme at BBC Radio Humberside.
Crown glass is a type of optical glass used in lenses and other optical components. It has relatively low refractive index (≈1.52) and low dispersion (with Abbe numbers between 50 and 85). Crown glass is produced from alkali-lime silicates containing approximately 10% potassium oxide and is one of the earliest low dispersion glasses .
Getty. But as it turns out, the glasses are just part of Drew's TV persona! While he occasionally wears them during his day-to-day life, the 59-year-old star's Instagram confirms that he usually ...
Glasses are worn for eye protection in some sports, such as squash. Glasses wearers may use a strap to prevent the glasses from falling off. Wearers of glasses that are used only part of the time may have the glasses attached to a cord that goes around their neck to prevent the loss and breaking of the glasses.
David Letterman (voiced by himself) - Letterman appears as himself in Late Night with Butt-Head. Prior to coming up with an idea for a television show as a class project that very closely approximates Letterman's show (in their imagination, Butt-Head appears as Letterman and Beavis as band leader Paul Shaffer ), B&B are watching television at ...
Dispersive prism. In optics, a dispersive prism is an optical prism that is used to disperse light, that is, to separate light into its spectral components (the colors of the rainbow ). Different wavelengths (colors) of light will be deflected by the prism at different angles. [1] This is a result of the prism material's index of refraction ...
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