For a converging lens, the object lies 19 cm from the lens and the image is 35 cm from the lens on the opposite side. What is the focal length of the lens? A light beam reflects from the surface of a mirror with an incident angle of 68 degrees from the normal. What is the angle between the incident ray and the reflected ray? A Global Positioning System (GPS) receiver is a device that lets you figure out where you are by receiving timed radio signals from satellites. It works by measuring the travel time for the signals, which is related to the distance between you and the satellite. By finding the ranges to several different satellites in this way, it can pin down your location in three dimensions to within a few meters. How accurate does the measurement of the time delay have to be in units of nanoseconds to determine your position to 10 m accuracy? 1 s = 10^9 ns Gamma rays typically have frequencies above 10 exahertz (or >1019 Hz). What is the corresponding wavelength in units of picometers (pm) of a gamma ray with a 3 * 1019 Hz? (1 pm = 10-12 m)? For a converging lens, the object is 20 cm from the lens and the image is 40 cm from the lens on the opposite side. What is the magnification of the image An object is placed 55 cm in front of a concave mirror with a focal length of 12 cm. Where is the image located? A 8-cm high object is placed 40 cm in front of a concave mirror with a focal length of 20 cm. How tall is the image? An image is formed using a converging lens with a focal length of 14 cm. The object is a distance of 6 cm from the lens. Where is the image located? A mirror is moving toward a stationary observer at 3 m/s. At what speed is the image of the observer in the mirror moving toward the observer? An image is formed using a converging lens with a focal length of 18 cm. The object is a distance of 2 cm from the lens. What is the magnification of the image