Answer:
What invention lets you look right through a wall?
When you take away the whole from me there is always some left.
In buckles or lace, I help set the pace. The farther you go, the thinner I grow. What am I?
I have no voice but I can teach you all there is to know. I have spines and hinges but I am not a door. Once Iβve told you all I cannot tell you more.
What has 88 keys, but canβt open a single door?
Millions of these are crushed every morning to help people wake up.