| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| refractive index definition | 1.28 | 1 | 5912 | 7 | 27 |
| refractive | 1.94 | 0.4 | 9386 | 31 | 10 |
| index | 0.47 | 0.6 | 5576 | 46 | 5 |
| definition | 1.13 | 0.2 | 40 | 94 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| refractive index definition | 1.03 | 0.1 | 1007 | 54 |
