Viscosity – with photo gate

Equipment:

1. Glass tube with diameter 4 cm and length 120 cm.
2. Different metallic balls in diameter.
3. Micrometer in range 0.25mm and with accuracy 0.01mm.
4. Metallic Holder for glass tube with ruler.
5. 2 L Glycerin.
6. 2 Photo gate.
7. Holder for photo gate