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Slit Spread

This simulation series is based on concept of Diffraction. Diffraction is the spreading of a wave after it passes a narrow gap. The wave bends into the shadow instead of going straight. A narrower gap spreads the wave more.

Physics · Class 12 · Diffraction by a slit · 8 simulations. For JEE, NEET and your boards.

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What you'll learn

  1. Sound round a door A sound wave spreads through a doorway. Find the doorway width from the first quiet direction.
  2. First dark band Light passes one narrow slit. Find where the first dark band lands on the screen.
  3. Dark at an angle Find the slit width that puts the first dark band at a given angle.
  4. Between two dark bands Two dark bands on one side sit a known distance apart. Find the slit width.
  5. Fringes in the glow Two slits make fringes inside one central glow. Find the slit width that makes the glow a given number of fringes wide.
  6. Two close colours Two close colours pass one slit. Find the gap between their first side bright bands.
  7. Best pinhole A pinhole throws a spot of light on the back wall of a box. Find the hole radius that makes the smallest spot.
  8. Blue sky Air scatters sunlight. Find how many times more the violet light scatters than the red light.