Refractive Index Tester:
1. Experiment disc: The diameter 25 centimeters, thickness is the 1cm
plastic cushioning,the printing hairline and angle scoring, the smallest
scoring is 0.5 degree.
2. Semicircle transparent plastic case: It has the red center of circle
index line,the radius is 6cm,high is 3cm.
3. Rectangular transparent plastic brick: 25mm×50mm×80mm.
4. One of 15cm metallic tape.
5. Six of Bead needle, bottled.