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Thin Lens Image Distance Calculator

Use this online thin lens image distance calculator with labeled inputs and a worked example. 1/f = 1/do + 1/di; m = −di/do.

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lens equation solver online

Use thin lens image distance calculator online with the physical quantities shown below. Thin lens and real object; positive image distance is real, negative is virtual.

How to use it

Enter Signed focal length (m). Set Real object distance (m). Select Calculate, check the result units, then copy or download the JSON result.

Options and example settings

OptionChoices / valueExample default
Signed focal length (m)Main input. Decimal or scientific notation. 0.1
Real object distance (m)Option. Decimal or scientific notation. Positive values only. 0.3

Calculation method

1/f = 1/do + 1/di; m = −di/do

Worked examples

Worked case for thin lens image distance calculator. Thin lens and real object; positive image distance is real, negative is virtual.

Thin Lens Image Distance Calculator — example with explicit inputs

Settings: Real object distance (m): 0.3

Input:

0.1

Expected result for the example input and options:

Output:

{
  "image_distance_m": 0.15000000000000002,
  "magnification": -0.5000000000000001
}

Limitations and common mistakes

  • Thin lens and real object; positive image distance is real, negative is virtual.
  • Match every input to its displayed unit; scientific notation such as 1e-6 is accepted.
  • This is the documented idealized model; real systems may require additional effects and measurement uncertainty.

Frequently asked questions

How can I use lens equation solver online?

Enter Signed focal length (m). Set Real object distance (m). Select Calculate, check the result units, then copy or download the JSON result.

Which model does Thin Lens Image Distance Calculator use?

1/f = 1/do + 1/di; m = −di/do. Thin lens and real object; positive image distance is real, negative is virtual.

Technical references

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.

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