`theta_f = theta_i+theta_o`

Enter a value for all fields

The Focal Angle is found using the following equation: `theta_i=theta_f-theta_o`, where:

• `theta_i`= image angle
• `theta_o`= object angle
• `theta_f`= focal angle

References

30.1 A real image formed by a converging mirror  by Benjamin Crowell, Light and Matter  licensed under the Creative Commons Attribution-ShareAlike license.