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Density wave theory is the preferred explanation for the well-defined structure of grand design spirals, [2] first suggested by Chia-Chiao Lin and Frank Shu in 1964. [3] The term "grand design" was not used in this work, but appeared in the 1966 continuation paper; [4] Lin [5] (along with Yuan and Shu [6]) is usually credited with coining of the term.
The design for Toby's five-building home contains six bedrooms, six bathrooms, a music studio and an annexe - a vast project more like a village than a house. Creating this life changing vision on a £530k budget, and in only eight months, will not be an easy task, especially as they must build up close to an ancient oak without destroying any ...
Metallizing: A way of coating mirrors for high-efficiency light reflection. Optical coating: Thin layers applied to mirrors, filters, and lenses to avoid reflections, as well as absorb certain colors.
Reflecting telescopes became extraordinarily popular for astronomy and many famous telescopes, such as the Hubble Space Telescope, and popular amateur models use this design. In addition, the reflection telescope principle was applied to other electromagnetic wavelengths, and for example, X-ray telescopes also use the reflection principle to ...
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Grand design spiral galaxy, a type of spiral galaxy; Program for Action, or Grand Design, a former New York City Subway expansion plan; Grand Design, the project to integrate the Louvre Palace and Tuileries Palace in Paris, France; Groot Desseyn, the Dutch West India Company's plan to seize the Iberian Union's possessions in Africa and the Americas
A set of three mutually perpendicular reflective surfaces, placed to form the internal corner of a cube, work as a retroreflector. The three corresponding normal vectors of the corner's sides form a basis (x, y, z) in which to represent the direction of an arbitrary incoming ray, [a, b, c].
Diagram of a Czerny–Turner monochromator A combined reflecting-focusing diffraction grating A Littrow grating monochromator. This is similar to the Czerny–Turner but uses a common collimator/refocusing mirror. In the common Czerny–Turner design, [1] the broad-band illumination source (A) is aimed at an entrance slit (B). The amount of ...