Physlets run in a Java-enabled browser on the latest Windows & Mac operating systems.
If Physlets do not run, click here for help on updating Java and setting Java security.
Problem 35.11: Build a converging lens
Please wait for the animation to completely load.
Light rays from a point source, initially in air, are incident on a lens made from a material with an index of refraction of 2.5 (position is given in centimeters). The radius of curvature of the left side of the lens is -10 cm (10-cm radius and concave, so rays diverge upon entering it). You can change the radius of the right side. Restart. Build a lens so that the light rays from the point source will converge on the green screen.
- What is the focal length of this lens?
- Calculate the radius of curvature of the right side of the lens, then test your calculation.
Problem authored by Anne J. Cox.