| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| particle theory of light | 1.58 | 0.6 | 7508 | 19 | 24 |
| particle | 0.63 | 0.5 | 690 | 12 | 8 |
| theory | 1.25 | 0.2 | 6826 | 64 | 6 |
| of | 0.44 | 0.4 | 5979 | 49 | 2 |
| light | 0.34 | 0.4 | 5809 | 80 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| particle theory of light | 0.95 | 0.6 | 3233 | 71 |
