Science
Find out, from Table 9.3, the medium having the highest optical density. Also, find the medium with the lowest optical density.
| S. No. | Material Medium | Refractive Index |
|---|---|---|
| 1. | Air | 1.0003 |
| 2. | Ice | 1.31 |
| 3. | Water | 1.33 |
| 4. | Alcohol | 1.36 |
| 5. | Kerosene | 1.44 |
| 6. | Fused quartz | 1.46 |
| 7. | Turpentine oil | 1.47 |
| 8. | Benzene | 1.50 |
| 9. | Crown glass | 1.52 |
| 10. | Canada Balsam | 1.53 |
| 11. | Rock salt | 1.54 |
| 12. | Carbon disulphide | 1.63 |
| 13. | Dense flint glass | 1.65 |
| 14. | Ruby | 1.71 |
| 15. | Sapphire | 1.77 |
| 16. | Diamond | 2.42 |
Refraction Lens
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Answer
The optical density of a medium is directly proportional to its refractive index.
Hence, in Table 9.3:
Medium with highest optical density = Diamond (Refractive Index 2.42)
Medium with lowest optical density = Air (Refractive Index 1.0003)
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S.
No.Material Medium Refractive Index 1. Air 1.0003 2. Ice 1.31 3. Water 1.33 4. Alcohol 1.36 5. Kerosene 1.44 6. Fused quartz 1.46 7. Turpentine oil 1.47 8. Benzene 1.50 9. Crown glass 1.52 10. Canada Balsam 1.53 11. Rock salt 1.54 12. Carbon disulphide 1.63 13. Dense flint glass 1.65 14. Ruby 1.71 15. Sapphire 1.77 16. Diamond 2.42 The refractive index of diamond is 2.42. What is the meaning of this statement?