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.
Dude is American English slang for an individual, typically male. From the 1870s to the 1960s, dude primarily meant a person who dressed in an extremely fashionable manner (a dandy) or a conspicuous citified person who was visiting a rural location, a city slicker.