The formula to calculate the Focal Length of Concave Mirror with Virtual Image is:
\[ f_{\text{concave, virtual}} = \frac{v_{\text{concave, virtual}} \cdot u_{\text{concave, virtual}}}{u_{\text{concave, virtual}} - v_{\text{concave, virtual}}} \]
Where:
Focal Length of Concave Mirror with Virtual Image is the distance between the mirror's vertex and the focal point when the image formed is virtual and upright.
Let's assume the following values:
Using the formula:
\[ f_{\text{concave, virtual}} = \frac{(-0.2) \cdot 1.3}{1.3 - (-0.2)} \]
Evaluating:
\[ f_{\text{concave, virtual}} = -0.173333333333333 \text{ m} \]
The Focal Length of Concave Mirror with Virtual Image is -0.173333333333333 m.
| Image Distance of Concave Mirror Virtual Image (m) | Object Distance in Concave Mirror Virtual Image (m) | Focal Length of Concave Mirror with Virtual Image (m) |
|---|---|---|
| -0.2 | 1.3 | -0.173333333333 |
| -0.19 | 1.3 | -0.165771812081 |
| -0.18 | 1.3 | -0.158108108108 |
| -0.17 | 1.3 | -0.150340136054 |
| -0.16 | 1.3 | -0.142465753425 |
| -0.15 | 1.3 | -0.134482758621 |
| -0.14 | 1.3 | -0.126388888889 |
| -0.13 | 1.3 | -0.118181818182 |
| -0.12 | 1.3 | -0.109859154930 |
| -0.11 | 1.3 | -0.101418439716 |