In a closed room with no windows, Kavi and Leena are standing at opposite corners. If Kavi holds a large opaque sheet in front of him, what happens to Leena's ability to see Kavi?

Make your response very short.
The large opaque sheet held by Kavi will block Leena's line of sight towards him. Leena will not be able to see Kavi because the sheet prevents light from Kavi's side of the room from reaching her eyes. The sheet acts as a barrier, rendering Kavi invisible to Leena from her position.