Category Archives: Electromagnetic Radiation

Tesla Coil

Demo: EM-N-TC
Pira Index: 5N 20.50

 Lab Equipment  Directions
  1.  Tesla coil with grounding wire
  2. Fluorescent tube
  3. Neon (spectra) tube
  4. Wood to turn off coil (meter stick)
  1.  Place Tesla coil away from all metal objects and turn it on.
  2. Holding the ground wire, bring the end of the wire near the top of the Tesla coil to draw a spark. As you pull the ground wire away from the coil, the longer the spark discharges.
  3. Attach ground wire to the end of the neon or fluorescent tube. Keeping hands away from any metal on the tube, bring the tube near the top of the coil and observe the effects.
Turn off Tesla coil with wood only.


Light Spectra

Demo: EM-N-LS
Pira Index: 5N 30.10

 Lab Equipment  Directions
  1.  2 60 degree prisms
  2. 35mm projector
  3. Projector cart
  4. Optical slit slide
  5. 2″ x 4″ x 6″ block
  6. Screen or wall
  1.  Set up as shown in figure with prism #1 in place on the block.
  2. Turn on the projector and if a rainbow does not show on the screen, rotate prism #1 either to the left or right until a rainbow appears.
  3. Put prism #2 in between prism #1 and the rainbow beam, and you should see again a beam of white light; if not, rotate prism #2 either to the left or right until white light show up again.