SARALPHYSICS • INTERACTIVE PHYSICS TOOL
Mirror Formula Calculator
Calculate focal length, object distance, image distance and magnification with an interactive ray diagram.
1/f = 1/v + 1/u
1. Select Mirror Type
Tip:
Select the quantity you want to calculate. Enter the other two values
with their signs according to the Cartesian sign convention.
2. Enter Values
cm
cm
cm
3. Result
Image Distance
−30 cm
Calculated using the mirror formula
Magnification
—
Image Type
—
Orientation
—
Image Size
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Interactive Ray Diagram
LIVE RESULT
Diagram is automatically scaled for visual understanding and may not
represent exact physical dimensions.
Cartesian Sign Convention
• All distances are measured from the pole of the mirror.
• Distances measured in the direction of incident light are positive.
• Distances measured opposite to the direction of incident light are negative.
• For a real object placed in front of the mirror, object distance (u) is negative.
• Focal length is negative for a concave mirror and positive for a convex mirror.
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