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Problem 35.11: Build a converging lens

radius of curvature of right side of lens = cm

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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.

  1. What is the focal length of this lens?
  2. Calculate the radius of curvature of the right side of the lens, then test your calculation.

Problem authored by Anne J. Cox.

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

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