Perception (G+60)

  G+60+5 Pulfrich Effect: Pendulum and polaroid experiment.
  G+60+10 Limit of resolution: Two movable pin-points of light.
  G+60+15 Limit of audibility: Set of rods that ring at different frequencies.
  G+60+20 Set of color blindness cards.
  G+60+25 Rotating disk with black and white lines makes color illusion.
  G+60+30 Purkinje effect: At low intensity, blue is more visible than red.
  G+60+35 Two sides plus red and green light gives full color illusion.
  G+60+40 Detection of the IR, visible, and UV spectra using arc lamp on TV camera.