Experiment: To show capillary action in narrow spaces
Equipment: two panes of glass, match stick, container, elastic band, water, food colouring.
Method
- Fill the container with water.
- Add the food colouring and mix until the water has changed colour.
- Set up equipment as in diagram below.
Results
Water will rise highest at the end where the pores are close together and very little rise will occur at the other end.
Conclusion
The larger the airspaces the less moisture will rise up by capillary action.
