EVERYDAY CLARITY
Mirror Equation Calculator
Where does an ideal spherical mirror form an image? Enter the stated values to calculate this model.
Your result
Signed image distance
m
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Signed focal length (m) | Enter signed focal length in m; use the same basis as the other measurements. |
| Object distance (m) | Enter object distance in m; use the same basis as the other measurements. |
Understanding your result
Read Signed image distance (m) in the units and model stated on this page. The formula image=1/(1/f-1/object) defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
Where does an ideal spherical mirror form an image?
Where does an ideal spherical mirror form an image? Enter the stated values to calculate this model.
Common uses
- Where does an ideal spherical mirror form an image
How it works
image=1/(1/f-1/object)
Worked example
Enter Signed focal length: 0.1 m; Object distance: 0.3 m. Results: Signed image distance: 0.15 m.