Consider a bright point of light located 1 m from a square opening of area 1 square meter....

Consider a bright point of light located 1 m from a square opening of area 1 square meter. Light passing through the opening illuminates an area of 4 m2 on a wall 2 m from the opening, (a) Find the area illuminated if the wall is moved to a distance of 3 m, 5 m, or 10 m. (b) How can the same amount of light illuminate more area as the wall is moved farther away?