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Fluorite (also called fluorspar) is the mineral form of calcium fluoride, CaF 2.It belongs to the halide minerals.It crystallizes in isometric cubic habit, although octahedral and more complex isometric forms are not uncommon.
The iPhone 11, 11 Pro, and 11 Pro Max were announced on September 10, 2019. The iPhone 11 was the successor to the iPhone XR, while the iPhone 11 Pro and 11 Pro Max succeeded the iPhone XS and XS Max. All models gained an ultra-wide lens, enabling two-times optical zoom out, as well as larger batteries for longer battery life. [48] [49] The ...
Burning (Korean: 버닝; RR: Beoning) is a 2018 South Korean-Japanese psychological drama film [3] [4] co-written, produced, and directed by Lee Chang-dong.The film is based on the short story "Barn Burning" from The Elephant Vanishes by Haruki Murakami, with elements inspired by William Faulkner's story of the same name. [5]
The XS' battery is a new single-cell L-shaped battery, while the iPhone XS Max battery remains two cells like the iPhone X. [23] Apple said that the iPhone XS lasts up to 30 minutes longer than iPhone X, while the iPhone XS Max lasts up to 1.5 hours longer than iPhone X. [24]
Internal focusing, which focuses binoculars by moving internal mounted optical lenses located between the objective lens group and the prism assembly – or rarely located between the prism assembly and eyepiece lens assembly [23] [38] – within the housing without changing the volume of the binoculars. The addition of a focusing lens reduces ...
Sidewalk prisms were cast in one piece as single or multiple-prism lenses, and inserted into load-bearing frames. Daylight redirecting film is made of acrylic. Damaged prism tiles may be repaired, and as they came in standard designs, there is a salvage market in replacements. Replacements for one-piece castings can be commissioned.
Dong spent the first few years as a trainee cleaning the studio for the other artists in the company and fetching them water bottles during dance practices, later admitting that current artists at the time weren't friendly towards him or Kwon. [5] In 2003, Dong provided the rap verse in singer Wheesung's single "Player" on the latter's second ...
In his book Opticks, Newton was the first to show a diagram using a prism as a beam expander, and also the use of multiple-prism arrays. [77] Some 278 years after Newton's discussion, multiple-prism beam expanders became central to the development of narrow-linewidth tunable lasers.