TRIPLE INVESTIGATING LIGHT

• equipment

  a3 paper

  ray box lens/slit
• what does the ray box produce

  narrow ray of light
• what should you do when not using the ray box

  switch it off
• first step

  draw a straight-line on your a3 paper down the centre using a ruler

  use a protract to draw your normal at 90
• step 2

  place a glass block near the center of the line so the normal is near the block, draw around the glass block
• step 3

  use a ray box to direct a ray of light so it hits the block at the normal, this is your incident ray.
• what is the angle between the incident ray and normal called

  angle of incidence
• step 4

  mark the ray of light emerging from the glass block, your /transmitted ray, angle of r
• step 5

  draw the points to show the path of the complete ray through the box
• step 6

  use a protractor to measure angle of I and angle of R
• step 7

  continue doing at different intervals or different materials of blocks