Add Yahoo as a preferred source to see more of our stories on Google. Two men installing ceiling tiles on dropped ceiling - Andrew Angelov/Shutterstock Whether you're trying to make your unfinished ...

Q:What is a drop ceiling? Are there options for replacing one? Answer: Drop ceilings consist of a metal grid that hangs from the ceiling joists and holds panels of various shapes, sizes and materials.

As we observe closely spaced parallel lines at a specific angle, we may be deceived by the illusion of a continuous or three-dimensional surface, although they are, in fact, individual lines. This ...