This question is concerned with special relativity and relative velocity. If a spaceship is traveling at 2x10 eighth m/s and someone shines a laser straight ahead out the front of the ship. Suppose someone in front of the ship records the velocity of the light. Since the speed of light is the same in all frames of reference the speed should be 3x18 to the eighth and not 5x10 to the eighth(adding the two velocities). Here is my question...since the ship is moving with a force which allows it to travel at 2x10 to the eighth, doesn't this same force push on the photons in the light and force them to travel faster?