arbitrary polarization. design an experimental arrangement of waveplates that will produce an arbitrary state of polarization, characterized by an ellipticity b/a, where a is the major axis and b is the minor axis, and an orientation angle φ of the major axis clockwise from the vertical

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.