The standard equation of parabola whose distance from focus to collimator is 2 is obtained

The standard equation of parabola whose distance from focus to collimator is 2 is obtained

When the focus is on the x-axis, the standard equation of the parabola is y2 = 4x or y2 = - 4x. When the focus is on the y-axis, the standard equation of the parabola is x2 = 4Y or x2 = - 4Y