In a room, Nia stands with her back against the north wall, while Levon stands with his back against the south wall. Both are facing the east wall, where there is a clock hanging. On the west wall, directly behind the clock but much higher up, is a small window letting in some daylight. Given that Nia and Levon are standing at ground level and the clock is above their eye level, can Nia and Levon tell if the clock is working just by looking at the reflection of the clock's face in the window? Provide a very brief response.
Nia and Levon will be able to see the reflection of the clock's face in the window because the clock is positioned between them and the window, and light from the clock's face will reflect off the glass. Assuming there is sufficient light and the angle of reflection allows for the clock's face to be visible, they can observe the movement of the clock's hands in the reflection to determine if the clock is working. If the hands are observed to move consistently in the reflection, they will know that the clock is working. However, if the hands remain stationary over a period of time when they are looking at the reflection, they will deduce that the clock is not working.