Group Light Quiz 1
Refraction
Figure 1
Medium 1
Medium 2 

Optically less dense
Optically more dense 
C_{n} speed of light in medium
where c = 3.00 X 10^{8}_{ }m/s
You solve for the speed of light in a medium (C_{n}), by doing the following:
First multiple both sides by C_{n}, so that
(C_{n}) n = _C_C_{n}
C_{n}
Then
C_{n} n = C
Next, multiple both sides by 1/n, so that
C_{n} (1/n)n = _C_
n
Then,
C_{n} = _C_
n
Substance 
N 
C_{n} 
Crown glass 
1.52 
X 10 ^{覧} 
Flint glass 
1.66 
X 10 ^{覧} 
Diamond 
2.42 
X 10 ^{覧} 
Ice 
1.31 
X 10 ^{覧} 
Water 
1.33 
X 10 ^{覧} 
Air at 0^{O}C 
1.00029 
X 10 ^{覧} 
H_{2} at 0^{O}C 
1.00013 
X 10 ^{覧} 
Table 2
Light 
n 
Red 
1.51 
Green 
1.52 
Blue 
1.53 