Refractive indices of four media A, B, C and D are given below:
In which of these four media is the speed of light:
|
Medium
|
Refractive index
|
|
A
B
C
D
|
1.33
1.44
1.52
1.65
|
- Maximum, and
- Minimum?
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The refractive index of a medium is related to the speed of light as follows:$\text{Refractive index}=\frac{\text{Speed of light in vacuum}}{\text{speed of light in a mediums}}$
Since the speed of light in vacuum is a constant, the refractive index becomes inversely proportional to the speed of light in a medium.
Since the speed of light in vacuum is a constant, the refractive index becomes inversely proportional to the speed of light in a medium.
- The speed of light is maximum in a medium that has the lowest refractive index, i.e., medium A.
- The speed of light is minimum in a medium that has the highest refractive index, i.e., medium D.
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