Thin-Lens Equation:Newtonian Form In the Newtonian form of the lens equation, the distances from the focal length points to the object and image are used rather than the distances from the lens. Newton used the extrafocal distances x o and x i in his formulation of the thin lens equation. It is an equivalent treatment, but the Gaussian form will be used in this resource. To common form of lens equation in introductory texts
Meaning flavored carbonated beverage is from 1812. A new manufactory of a nectar, between soda-water and ginger-beer, and called pop, because 'pop goes the cork' when it is drawn. [Southey, letter, 1812] Sense of ice cream on a stick is from 1923 (see popsicle). Meaning the (brief) time of a 'pop' is from 1530s. Pop goes the weasel, a country dance, was popular 1850s in school yards, with organ grinders, at court balls, etc. father, 1838, chiefly American English, shortened from papa (1680s), from French papa, from Old French, a children's word, similar to Latin pappa.
urban. adj. 1. (Human Geography) of, relating to, or constituting a city or town. 2. (Human Geography) living in a city or town. 3. (Pop Music) (of music) emerging and developing in densely populated areas of large cities, esp those populated by people of African or Caribbean origin.