| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| the principle of optics | 0.92 | 0.1 | 3993 | 82 | 23 |
| the | 0.93 | 0.8 | 33 | 54 | 3 |
| principle | 0.36 | 0.4 | 5775 | 34 | 9 |
| of | 0.67 | 0.9 | 2201 | 63 | 2 |
| optics | 1.4 | 0.3 | 59 | 25 | 6 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| the principle of optics | 1.23 | 0.7 | 1693 | 15 |
