1. Consider a spaceship (blue ellipse in the figure) that is a very long 500 m in its rest frame. For safety reasons, the ship is equipped with beacons at its front and back ends, labeled F and B respectively in the figure: 0.7c F B d Detector The beacons emit light with a frequency fo in the rest frame of the ship. The front end of the ship is located a distance d = 150 m above a detector when it sends light signals (red arrows in the figure) to the detector from the front and the back beacons. The ship travels left at a speed 0.7c relative to the detector. Find the ratio f/fo, /o, and /B, where fF is the frequency the detector measures coming from the front and f is the frequency the detector measures coming from the back.