A double-concave (thickest at the edges, thinnest in the middle) thin lens is made of glass with an index of refraction of 1.6.
The radius of curvature of the left and right faces of the lens are 65 cm and 75 cm, respectively. The object lies to the left of the lens. What is the focal length of the lens
We define voltage as the amount of potential energy between two points on a circuit. One point has more charge than another. This difference in charge between the two points is called voltage.