Answer:
I have hands but cannot clap
Many people own a copy of me. Without me the world would fall.
I'm light as a feather yet the strongest person can't hold me for more than a few minutes. What am I?
The more of me there is the less you see.
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.
Why did the teacher have to wear sunglasses?