In a room, Quinton is facing a wall with a mirror on it, and behind him stands Tallulah. Tallulah is holding a red ball above Quinton's head but slightly to his right. Can Quinton see the red ball in the mirror without turning around? Respond very briefly.
Quinton can see the red ball in the mirror if the ball is within the line of sight of the mirror's reflective surface. Since Tallulah is holding the ball above and slightly to his right, and assuming the mirror is large enough to reflect a view of the space above Quinton's head, the ball will be visible in the mirror. Mirrors reflect light according to the angle of incidence equals the angle of reflection principle; thus, if the ball is at an angle where the path of light from the ball to the mirror to Quinton's eyes follows this rule, it will be seen by Quinton in the mirror's reflection.