In a room with a single window, Zara is standing and looking outside. On the opposite side of the room, Javier is looking at a painting on the wall, and the window is directly behind him in his line of sight. Given that the painting is opaque, can Zara see Javier's face and if not, what can she see? Provide a very short response.
Zara cannot see Javier's face because the painting is between them, blocking her line of sight. The painting is opaque, which means it does not allow light to pass through it. Since Javier's face is on the side of the painting facing away from Zara, his face is not visible to her. Instead, Zara can see the back of the painting and the part of the wall on which the painting is hung.