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Some representative refractive indices; Name of material λ (nm) Refractive index no. n Reference Vacuum: 1 (by definition) Air at STP: 1.000273 [citation needed]Gases at 0 °C and 1 atm
For example, the Nikon D3 and D700 cameras' nominally full-frame sensors actually measure 36 × 23.9 mm, slightly smaller than a 36 × 24 mm frame of 35 mm film. As another example, the Pentax K200D 's sensor (made by Sony ) measures 23.5 × 15.7 mm, while the contemporaneous K20D 's sensor (made by Samsung ) measures 23.4 × 15.6 mm.
During the Cold War, in 1983, the Swedish Army required vehicles with high mobility, air defence and anti-tank capability, high survivability and protection. In 1985, the "stridsfordon 90" project group, made up of representatives from the Swedish Armed Forces (Försvarsmakten), the FMV and Swedish industry (including Hägglunds and Bofors), finalized the design for a "unity vehicle" that ...
People remain contagious for up to 20 days and can spread the virus even if they do not develop symptoms. [ 16 ] Testing methods for COVID-19 to detect the virus's nucleic acid include real-time reverse transcription polymerase chain reaction (RT‑PCR), [ 17 ] [ 18 ] transcription-mediated amplification , [ 17 ] [ 18 ] [ 19 ] and reverse ...
The Game Boy Pocket was released in Japan on July 20, 1996, and in North America on September 2, 1996, for US$69.99 (equivalent to $136 in 2023). [51] The Game Boy Pocket revitalized hardware sales and its release was ultimately well-timed as it coincided with the release of the first Pokémon game, which became a major hit and catapulted the ...
The Kalka-Shimla Railway, a 762 mm (2 ft 6 in) narrow-gauge railway in the Siwalik Hills of Himachal Pradesh started operating in 1903. The Nilgiri Mountain Railway, a 1,000 mm (3 ft 3 + 3 ⁄ 8 in) metre gauge rack railway in the Nilgiri Hills of Tamil Nadu was opened in 1908 and is the only operational rack railway in India.
Ludhiana (Punjabi: ludhiāṇā pronounced [lʊ́(d̪)tɪ̀ɪˈäːɳäː]) is the most populous city in the Indian state of Punjab. [9] The city has an estimated population of 1,618,879 as of the 2011 census and distributed over 310 km 2 (120 sq mi), [6] making Ludhiana the most densely populated urban centre in the state. [10]