What is absolute refractive index
Asked by admin @ in Physics viewed by 309 People
Explain the term absolute Refractive Index of a medium and write an expression related to it with the speed of light in vacuum
Asked by admin @ in Physics viewed by 309 People
Explain the term absolute Refractive Index of a medium and write an expression related to it with the speed of light in vacuum
Answered by admin @
The refractive index of a medium is defined as the ratio of velocity of light in first medium to the velocity of light in that medium.
Mathematically refractive index
is the velocity of light in first medium.
is the velocity of light in second medium i.e the medium under consideration.
Let the first medium is space or vacuum.
Now, the velocity of light in first medium will be c where c is the velocity of light.
Now, the refractive index
v is the velocity of light in second medium i.e medium under consideration.
Now the refractive index obtained is called absolute refractive index.
Hence, the absolute refractive index of a medium is defined as the ratio of the velocity of light in air to the velocity of light in that medium.
Mathematically the absolute refractive index =
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