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51Infrared astronomy — is the branch of astronomy and astrophysics which deals with objects visible in infrared (IR) radiation. Visible radiation ranges from 400 nm (blue) to 700 nm (red). Longer wavelengths than 700 nm but still shorter than microwaves are called… …
52Business and Industry Review — ▪ 1999 Introduction Overview Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …
53Data storage device — Many different consumer electronic devices can store data …
54USB flash drive — JumpDrive redirects here. For the fictional propulsion system, see Jump drive. SanDisk Cruzer Micro, a brand of USB flash drives …
55Eyeglass prescription — Using a phoropter to determine a prescription for eyeglasses An eyeglass prescription is an order written by an eyewear prescriber, such as an optometrist or ophthalmologist, that specifies the value of all parameters the prescriber has deemed… …
56Material properties of diamond — This article addresses the material properties of diamond. For a broader discussion of diamonds, see diamond. For other uses of the word diamond, see diamond (disambiguation). Diamond An octahedral diamond crystal in matrix Gener …
57Dolby Stereo — Dolby Stereo, is the trade mark that Dolby Laboratories used for the various analogue stereo cinema sound formats that they produced. Two basic systems used this name. The first was the Dolby SVA (stereo variable area) system used with optical… …
58Visual acuity — 20/15 and 20/15 vision redirect here. For other uses, see 2020 (disambiguation). Typical Snellen chart used for visual acuity testing. Visual acuity (VA) is acuteness or clearness of vision, which is dependent on the sharpness of the retinal… …
59Search for Extraterrestrial Intelligence — SETI ist das Akronym für “Search for Extraterrestrial Intelligence” (deutsch: „Suche nach außerirdischer Intelligenz“). Damit bezeichnet man die Suche nach außerirdischen Zivilisationen. Seit 1960 werden verschiedene wissenschaftliche… …
60Blue — This article is about the colour. For other uses, see Blue (disambiguation). Blue …
