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Lens Grinder

This simulation series is based on concept of The lensmaker's formula. The formula ties a lens's focal length to its faces and its glass. A sharper curve bends light more, and denser glass bends it more too. A lens bends light only because its glass differs from what is around it.

Physics · Class 12 · The lensmaker's formula · 8 simulations. For JEE, NEET and your boards.

A picture of the Lens Grinder simulation

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What you'll learn

  1. Grind one face A plano-convex lens must focus at a set distance. Find the radius of its curved face.
  2. Which glass A lens of known shape has a known focus. Find the index of its glass.
  3. Dip it in water A glass lens goes into a liquid. Find the new focus distance behind it.
  4. A denser liquid A convex lens sits in a liquid denser than its glass. Find its new focal length.
  5. Dip a mirror A concave mirror goes under a liquid. Find where it focuses light now.
  6. Cut into four A lens is cut into four pieces. Find the power of one piece.
  7. Edge rays Sunlight hits a wide concave mirror far from the axis. Find where those rays cross.
  8. A third the size A plano-convex lens makes a smaller real image. Find the radius of its curved face.