What is Refractive Index | Absolute Refractive Index | Optical Density Explained | Grade 10 Physics
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What is Refractive Index, Formula
What is Refractive Index, Formula Explanation Absolute Refractive Index Optical Density Explained for Grade 10 & 12 Physics.
A ray of light changes its direction when it enters from one medium to another medium. This happens because speed of light is different in different media. For example; the speed of light is 3 x 〖10〗^8 m/s (2.99x〖𝟏𝟎〗^𝟖 m/s) in vacuum and it is 2.98 x 〖10〗^8 m/s in air.
Refractive Index is the extent of change of direction of light in a given pair of media. The refractive index is a relative value of speed of light in the given pair of media. Thus, to calculate the refractive Index the speed of light in two media is taken.
Let the speed of light in medium 1 is v1 and in medium 2 is v2
Therefore; refractive index of medium 2 with respect to medium 1 (n21)
When one medium is taken as vacuum and speed of light is taken in it, then the refractive index of second medium with respect to vacuum is called Absolute Refractive Index and it is generally denoted by n2.
Optical Density: Medium having greater value of refractive index is called optically denser medium, this means light will travel at slower speed in optically denser medium compared to in an optically rarer medium.
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A ray of light changes its direction when it enters from one medium to another medium. This happens because speed of light is different in different media. For example; the speed of light is 3 x 〖10〗^8 m/s (2.99x〖𝟏𝟎〗^𝟖 m/s) in vacuum and it is 2.98 x 〖10〗^8 m/s in air.
Refractive Index is the extent of change of direction of light in a given pair of media. The refractive index is a relative value of speed of light in the given pair of media. Thus, to calculate the refractive Index the speed of light in two media is taken.
Let the speed of light in medium 1 is v1 and in medium 2 is v2
Therefore; refractive index of medium 2 with respect to medium 1 (n21)
When one medium is taken as vacuum and speed of light is taken in it, then the refractive index of second medium with respect to vacuum is called Absolute Refractive Index and it is generally denoted by n2.
Optical Density: Medium having greater value of refractive index is called optically denser medium, this means light will travel at slower speed in optically denser medium compared to in an optically rarer medium.
.......
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Economics Concepts: https://goo.gl/yymX98
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6 سال پیش
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