Light

• Method for light?

  1. Insert collimating slit into ray box and turn it on to produce a narrow light ray.
  2. Place material block on paper and trace outline.
  3. Draw a normal (90° line) at the point where incident ray meets the block.
  4. Mark the reflected and refracted rays, then remove the block and connect the points.
  5. Use a protractor to measure:

  • Angle of incidence (between incident ray and normal).
  • Angle of reflection (between reflected ray and normal).
  • Angle of refraction (between refracted ray and normal inside the block).

  1. Repeat with different materials, using fresh paper each time.
• Independent variable (light)?

  • angle of incidence
• Dependent variable (light)?

  • angle of reflection
• Control Variables (light)?

  • distance of ray box from mirror
  • width of light beam
  • frequency/wavelength of light
• Safety for light?

  • make sure glass block doesn't have sharp edges
• Results of light experiment?