The formula to calculate the Resultant Intensity is:

\[ I = I_1 + I_2 + 2 \sqrt{I_1 I_2} \cos(\Phi) \]

Where:

- \(I\) is the Resultant Intensity (cd)
- \(I_1\) is Intensity 1 (cd)
- \(I_2\) is Intensity 2 (cd)
- \(\Phi\) is the Phase Difference (rad)

Resultant Intensity is the intensity of the resulting wave pattern formed by the superposition of two or more waves, providing information about the combined effect of the individual waves.

Let's assume the following values:

- Intensity 1 (\(I_1\)) = 9 cd
- Intensity 2 (\(I_2\)) = 18 cd
- Phase Difference (\(\Phi\)) = 0.67195176201769 rad

Using the formula:

\[ I = 9 + 18 + 2 \sqrt{9 \cdot 18} \cos(0.67195176201769) \]

Evaluating:

\[ I = 46.9219512500029 \text{ cd} \]

The Resultant Intensity is 46.9219512500029 cd.

Intensity 1 (cd) | Intensity 2 (cd) | Phase Difference (rad) | Resultant Intensity (cd) |
---|---|---|---|

8 | 18 | 0.67195176201769 | 44.782595764460 |

9 | 18 | 0.67195176201769 | 46.921951250003 |

10 | 18 | 0.67195176201769 | 48.999580461616 |