A ray box is a tool used for a variety of optics experiments, including refraction, reflection, and dispersion of light. Here are some procedures you can perform with a ray box:
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RefractionTo investigate refraction, you can:
- Place a glass block on a sheet of paper and trace around it
- Turn on the ray box and direct a beam of light at the block’s side face
- Mark the paper with the points where the ray enters, exits, and is close to the ray box
- Draw a dashed line normal to the block’s outline at each point
- Remove the block and join the points with three straight lines
- Repeat the procedure for a different angle of incidence
- Place a glass block on a sheet of paper and trace around it
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Parallel beamsTo make sure beams are parallel, you can:
- Insert a slide with three slits into the ray end of the light box
- Adjust the condenser lens until the beams are parallel
- Use a ruler to measure the distance between the centers of the two outside beams
- Insert a slide with three slits into the ray end of the light box
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