Try your hardware store.
they have hollow bones because they need to be light
Boomwhackers are light weight, hollow plastic tubes that come in different colors that are tuned to musical pitches by length. Boomwhackers are musical instruments in the percussion family.
Most commonly it's used to score small diameter glass tubing before breaking it so that it will break cleanly instead of shattering. Don't attempt to saw through the tubing with the file. If it won't break cleanly with a light score, you'll need to use a different technique such as scribing followed by thermal shock.
bird bones are hollow. that is why they are light
Bones are light because they are hollow in the middle.
Most commonly it's used to score small diameter glass tubing before breaking it so that it will break cleanly instead of shattering. Don't attempt to saw through the tubing with the file. If it won't break cleanly with a light score, you'll need to use a different technique such as scribing followed by thermal shock.
Most commonly it's used to score small diameter glass tubing before breaking it so that it will break cleanly instead of shattering. Don't attempt to saw through the tubing with the file. If it won't break cleanly with a light score, you'll need to use a different technique such as scribing followed by thermal shock.
They are hollow and light.
yes
Because there is a hollow space inside the prism, the light would be refracted twice, turning it back to white light.
Plastic is most of the time light to carry by itself, unless there is something in the plastic.
About 100 light-years in diameter.