| Material
|
εR
|
σ/ωε
|
| Air
|
1.0006
|
|
| Alcohol, ethyl
|
25
|
0.1
|
| Aluminum oxide
|
8.8
|
0.0006
|
| Amber
|
2.8
|
0.002
|
| Asbestos fiber
|
4.8
|
0.0004
|
| Bakelite
|
4.75
|
0.013
|
| Barium titanate
|
1200
|
0.013
|
| Carbon dioxide
|
1.001
|
| Glass
|
4-7
|
0.0002
|
| Glycerine
|
40
|
|
| Ice
|
4.2
|
0.1
|
| Mica
|
5.4
|
0.0006
|
|
| Material
|
εR
|
σ/ωε
|
| Neoprene
|
6.7
|
0.02
|
| Paper
|
2-4
|
0.008
|
| Plexiglas
|
3.45
|
0.04
|
| Polyethylene
|
3.26
|
0.0005
|
| Polypropylene
|
2.25
|
0.0003
|
| Polystyrene
|
2.53
|
0.0004
|
| Porcelain (dry)
|
6
|
0.014
|
| Pyrex glass
|
5
|
0.0055
|
| Pyranol
|
4.4
|
0.0005
|
| Quartz (fused)
|
3.8
|
0.00075
|
| Rubber
|
2.5-3
|
0.002
|
| Silica (fused)
|
3.8
|
0.0002
|
|
| Material
|
εR
|
σ/ωε
|
| Sodium Chloride
|
5.9
|
0.0001
|
| Snow
|
3.3
|
0.02
|
| Soil (dry)
|
2.8
|
0.07
|
| Steatite
|
5.8
|
0.003
|
| Styrofoam
|
1.03
|
0.0001
|
| Teflon
|
2.03
|
0.0003
|
| Titanium dioxide
|
100
|
0.0015
|
| Turpentine
|
2.2
|
|
| Water (dist.)
|
80
|
0.04
|
| Water (sea)
|
|
4
|
| Wood (dry)
|
1.5-4
|
0.01
|
|