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PhysicsLight – Reflection and Refraction
Lens Formula & Power
Use 1/v − 1/u = 1/f for convex and concave lenses.
Controls
20 cm
30 cm
Live result
Image distance v
60cm
Magnification
-2
Power P = 1/f(m)
5D
Image
Real & inverted
Ray diagram — lensImage distance v: 60 cm
Power is positive for convex lenses and negative for concave lenses.