If Kofi is standing in a room with a single window and the sun is setting directly opposite the window, can Chang, who is standing outside the room on the same side as the window, see Kofi's face clearly?

Make your response very short.
No, Chang cannot see Kofi's face clearly. As the sun is setting directly opposite the window, Kofi's face would be backlit, creating a silhouette effect from Chang's perspective. The bright light from the setting sun would make it difficult for Chang to distinguish the features of Kofi's face because the intense backlight would cause Kofi's face to appear much darker than the surrounding light.