In a room, there is a mirror with the magical property that it only reflects objects that are in motion. Rajani is standing still in front of the mirror, while Kwame walks back and forth behind her. Without turning around, what can Rajani see in the mirror?
Respond very briefly.
Rajani, standing still, looks at the mirror. The mirror's magical property is that it only reflects objects in motion. Since Rajani is motionless, she will not see her own reflection. However, Kwame is moving behind her as he walks back and forth. Therefore, Rajani will see Kwame's reflection in the mirror when she looks at it. She will only see him when he is in motion and behind her within the line of sight of the mirror. If Kwame stops, he too will become invisible in the mirror just like Rajani. Rajani will only see the background of the room or any other objects in motion in the reflection, but not herself or Kwame unless he is moving.