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Sunken Coin

This simulation series is based on concept of Refraction at a flat surface. Light bends when it passes from one clear material into another. Because of this bending, things under water look nearer than they really are. Light that meets the surface at a big slant cannot get out. It comes straight back into the water.

Physics · Class 12 · Apparent depth · 8 simulations. For JEE, NEET and your boards.

A picture of the Sunken Coin simulation

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What you'll learn

  1. Pour the water A coin lies under water. Find how deep it looks from straight above.
  2. Raise the microscope A liquid fills a bucket. Find its height from the lift it gives the bottom.
  3. Two liquids Two liquids sit one above the other. Find the top layer's height from the total rise.
  4. Fish and bird A fish watches a bird dive. Find the bird's real speed from the speed the fish sees.
  5. Hide the bulb A lamp glows under a liquid. Find the smallest disc that keeps its light in.
  6. Index from the disc A lamp under a liquid lights a disc on the surface. Find the liquid's index.
  7. Bulb under two liquids A bulb glows under two liquids. Find the smallest disc that keeps its light in.
  8. Look at a slant You look at a coin under water from one side. Find how deep it looks along that line.