|
The thin strands that make up fiber optic cables can be plastic, but this material is more efficient |
glass
|
$600 |
DJ |
SCIENCE |
1996-03-06 |
#2658 |
|
The soda-lime type of this substance is made by melting together silica, sodium carbonate & lime |
glass
|
$500 |
J |
PHYSICAL SCIENCE |
1992-03-05 |
#1739 |
|
Pyrex is a trademark for a heat & chemical resistant type of this material |
glass
|
$200 |
J |
SCIENCE |
1991-11-20 |
#1663 |
|
When magma cools, it can form obsidian, a natural form of this type of amorphous substance |
glass
|
$800 |
DJ |
SCIENCE |
1988-02-26 |
#810 |