| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| refractive index definition | 0.9 | 0.6 | 8120 | 92 | 27 |
| refractive | 0.25 | 0.7 | 9095 | 16 | 10 |
| index | 1.22 | 0.9 | 8691 | 65 | 5 |
| definition | 1.8 | 0.4 | 5653 | 55 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| refractive index definition | 1.31 | 0.5 | 1637 | 65 |
