hi, consider the following scenario. say i have torch, the light from which i shine on a screen. i was wondering if an arrangement were possible wherein i have the screen sufficiently far away from me so that when i trace an arc with the torch, the bright spot on the screen moves faster than the speed of light. something like a huge circular screen of radius 300000km. then when i flick the torch in my hand at more than 1 radian/sec the spot should move in the screen at a speed greater than c. is that allowed? i mean, the spot on the wall is not a 'physical' thing, but it does go faster than c..