In a room with a single window, Zarina is standing with her back against the wall opposite the window. If it's a sunny day outside, what will Zarina observe about her shadow on the floor?

Provide a very brief response.
Zarina would see her shadow extending across the floor from her feet towards the wall with the window. Because the light source (the sun) is outside the window, and she is standing opposite to it, the light rays that pass through the window are blocked by Zarina's body, creating a shadow. The shadow will appear on the floor, starting at the base of her feet, since the sunlight is streaming in from a higher angle (from the position of the sun in the sky), and will stretch out in the direction of the light source. The exact length and direction of the shadow will depend on the angle of the incoming light and how far Zarina is standing from the window.