EVENTI

On January 29th the classical high school visited the new laboratory of the scientific high school observing also some experiments of Cardalab performed by two students of the applied sciences, by Professor Giorgolo and by the laboratory technician Paolo.

The first experiment concerns the optics, where the light is decomposed by means of a beam of white light that passes through a prism and is divided into the spectrum that composes it forming the "so-called" rainbow.

The second experiment is divided into three parts concerning the pressure:

In the first part a bottle, with a small side hole, is filled with water colored yellow and closed. The water will not come out until the bottle is closed because the internal pressure is equal to the external pressure; if instead we remove the cap, the water will come out of the hole because the external pressure (coming from above) is greater than the internal pressure.

In the second part is used a candle that is placed in a plate with water, then lit the candle and covered with a beaker, after a few seconds we can see that the flame goes out slowly. So the water will rise inside the beaker, because the atmospheric pressure pushes on the latter.

For the last part will be used an Erlenmeyer flask, a hard-boiled egg and a gauze that will be soaked in alcohol and heated, then placed in the flask. The egg placed above the opening of the flask will create a vacuum of air inside, causing the flame to go out. At the end the hard-boiled egg will enter the flask due to the pressure exerted by the latter.