Physlet Physics by Christian and Belloni: Problem 35.1

Problem 35.1: Hidden lenses, point sources

Object A: Restart

Object B: Restart

Object C: Restart

Object D: Restart

Please wait for the animation to completely load.

Four regions are hidden by curtains. You can drag the source of light to any location (position is given in meters).

What is behind each curtain?
Rank the objects in terms of their focal lengths from smallest to largest (most negative to most positive).

Problem authored by Melissa Dancy.

Physlets were developed at Davidson College and converted from Java to JavaScript using the SwingJS system developed at St. Olaf College.