The following table gives the refractive indices of a few media,
Use this table to give an example of:
|
|
1
|
2
|
3
|
4
|
5
|
|
Medium:
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Water
|
Crown glass
|
Rock salt
|
Ruby
|
Diamond
|
|
Refractive index:
|
1.33
|
1.52
|
1.54
|
1.71
|
2.42
|
- A medium pair so that light speeds up when it goes from one of these medium to another.
- A medium pair so that light slows down when it goes from one of these medium to another.
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- Light speeds up as it travels from a denser medium to a rarer one, ie., from a medium with a higher refractive index to one with a lower refractive index. An example would be the medium pair of diamond and water, where light travels from diamond to water.
- Using the same argument, light slows down as it travels from a medium with a lower refractive index to one with a higher refractive index. Therefore, the medium pair of crown glass and ruby can be taken as an example, where light moves from the crown glass to the ruby.
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