I'm still really confused about the speed of light. I'm kinda new at this so bear with me. Does the speed of light depend on the frame of reference it is in? For example lets say you have a ball moving at 10m/s in a car moving at 20m/s. This would mean that from the earth's frame of reference the ball is moving 30m/s. But what if you had a car moving half the speed of light. And a man in the car fired a light gun traveling at the maximum speed of light. What would the speed of the light from the gun be from the earth's frame of reference. Wouldn't it be 1.5 the speed of light? Why or why not is this not possible?