Description
Slide diffraction holes
SKU:212071
Brand: Jeulin
Slide with 4 calibrated holes
Hole diameters:
200, 400, 800 and 1200 µm
The progression of the Ø is as follows: 800 / 400 / 200 ... 1200, so as to let the pupils estimate a 'mystery diameter' from the 3 others, known
Accuracy about 10%