Concave Mirror Image Distance

Mirror formula 1/v + 1/u = 1/f · ch09-ray-optics-and-optical-instruments

Vary object distance u and see image distance v(u) for a concave mirror of focal length f. Note divergence at u = f.

Controls

Focal length |f| (cm)10 cm

initial speed u20.00 m/s

Live values

v = \frac{uf}{u-f}

Try this: x represents |u| (positive). v diverges when |u| = f, then a virtual image forms when |u| < f.