A flashlight has a parabolic reflector that reflects light

Last updated: 4/7/2024

A flashlight has a parabolic reflector that reflects light waves from a bulb located at the focus The figure shows a vertical cross section of such a parabolic reflector with the bulb at the focus Suppose the bulb is 0 1 inch from the vertex of the reflector and the distance across the widest part of the reflector is 4 inches Suppose also that the parabola formed by the cross section is located on a grid so that the vertex is at 0 0 0 1 in x 4 in The figure may not be drawn to scale The equation for the parabola is www