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An eye chart is a chart used to measure visual acuity comprising lines of optotypes in ranges of sizes. Optotypes are the letters or symbols shown on an eye chart. [ 1 ] Eye charts are often used by health care professionals, such as optometrists , physicians and nurses , to screen persons for vision impairment .
Line of sight (LoS) propagation from an antenna. Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver without obstacles. [1] Electromagnetic transmission includes light emissions traveling in a straight line.
The very short final line of a paragraph composed of a single word (highlighted blue) is a runt. The first line of a paragraph beginning at the end of a page (highlighted green) is called an orphan (sometimes called a widow). The last line of a paragraph continuing on to a new page (highlighted yellow) is a widow (sometimes called an orphan).
Line chart showing the population of the town of Pushkin, Saint Petersburg from 1800 to 2010, measured at various intervals. A line chart or line graph, also known as curve chart, [1] is a type of chart that displays information as a series of data points called 'markers' connected by straight line segments. [2]
Sight is defined as the observation of the altitude, and sometimes also the azimuth, of a celestial body for a line of position; or the data obtained by such observation. [1] The mathematical basis of sight reduction is the circle of equal altitude. The calculation can be done by computer, or by hand via tabular methods and longhand methods.
Mauritania's entire national rail network consists of a single line connecting the centre of the country's iron mining industry with the port city of Nouadhibou. Said line is also home to the world's longest and heaviest trains, filled with iron ore and as long as 3 kilometres (1.9 mi) in length.
In January 2006, the American Dialect Society named truthiness, a word which Colbert coined on the premiere episode of The Colbert Report, as its 2005 Word of the Year. He devoted time on five successive episodes to bemoaning the failure of the Associated Press to mention his role in popularizing the word truthiness in its news coverage of the ...
These lists of words are still assigned for memorization in elementary schools in America and elsewhere. Although most of the 220 Dolch words are phonetic, children are sometimes told that they can't be "sounded out" using common sound-to-letter phonics patterns and have to be learned by sight; hence the alternative term, "sight word".