Vacuum 1.00
ethyl alcohol
1.36
plexiglass/Lucite 1.51
glass (crystal)
1.54
air(0°C)
1.0003
quartz
1.46
glass (crown)
1.52
glass (flint) 1.65
water
1.33
glycerin
1.47
sodium chloride 1.53
diamond
2.42
1. The speed of light in a liquid is 2.25 x 10 8 m/s. What is...
a) the refractive index of the liquid? b) the liquid?
2. Using the table above, calculate the speed of light in Lucite.
3. What is the index of refraction of a liquid in which the speed of light is 2.60 x 10
8
m/s?
4. The index of refraction of a diamond is 2.42. What is the speed of light in diamond?
Medium 1
Index of Refraction (n 1)
Angle in Medium 1 (ø 1)
Medium 2
Index of Refraction (n 2)
Angle in Medium 2 (ø 2)
Air
1.0
60°
Flint Glass
1.65
Air
1.0
50°
Flint Glass
1.65
Air
1.0
40°
Flint Glass
1.65
Flint Glass
1.65
30°
Air
1.0
Flint Glass
1.65
35°
Air
1.0
Flint Glass
1.65
40°
Air
1.0
Air
1.0
60°
21°
Water
1.33
50°
43.9°
7. As light enters a medium which slows it down (index is higher or lower ), it bends ( towards or away ) from the normal line? As it re­enters air from this material, it speeds up and bends (
towards or away ) from the normal line