| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| formula to calculate refractive index | 0.55 | 0.4 | 1089 | 74 | 37 |
| formula | 1.17 | 0.9 | 3364 | 99 | 7 |
| to | 1.51 | 0.3 | 5469 | 81 | 2 |
| calculate | 0.74 | 0.7 | 3354 | 63 | 9 |
| refractive | 1.55 | 0.4 | 439 | 37 | 10 |
| index | 1 | 0.5 | 474 | 54 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| formula to calculate refractive index | 1.44 | 0.6 | 781 | 14 |
