Tell Me More! Masks under the Microscope
The image on the left is a mask viewed under an electron microscope. Find the three images below that are from the same mask!
The horizontal and vertical threads cross over. Think about how it would look from very close up, or seen from side on.
Which mask was under the electron microscope?
Now, which mask were those images taken of?
There's one correct answer.
- Nylon polyurethane mask
- Gauze mask
- Polyurethane mask
Properties of gauze masks
Gauze fabric is made from fine fibers twisted together into strands of about 100 micrometers thick, which are then woven together. There are gaps between the vertical and horizontal threads, but because the fabric is made of 10 or more layers, droplets cannot get through.