Select the type of lens and use the slider to set the magnitude
of the focal length, and then check your answer
Type of lens:
Converging lens
Diverging lens
Magnitude of the focal length
30 cm 100 cm
50
Inspired by a 2002 article in The Physics Teacher by Melissa Dancy, Wolfgang Christian, and
Mario Belloni.
Test your familiarity with lenses. You can find the focal length of a converging or diverging
lens by calculating it, but see if you can get to the point where you can find it without
doing a calculation.
Simulation first posted on 3-10-2018. Written by Andrew Duffy
