::: turning the arrow – experiment
We found a science experiment we thought was pretty cool and decided to try it with the children (to amaze them with our cleverness!).
However we’re not scientists … just very curious!
We drew an arrow on a piece of paper and placed it behind an empty glass – pointing to the right. Then the children filled the glass with water. The idea of this experiment is to show the children how the refraction of light through water changes things.
We experimented with many glasses before we found the ideal shape for this experiment.
When we checked out the arrow this time through the water, the arrow was pointing in the opposite direction.
One of the boys wondered if this experiment only worked with arrows so we invited him to write something on a piece of paper to see.
He wrote his intial on the paper and we repeated the experiment.
Taadaa! The letter faced the other way!
It is an optical illusion of course! It’s called refraction – Light only bends when it passes from a substance of one density into a substance of a different density. In this case from air to water.
Next we showed the children how the concave (turning inwards) surface of a spoon reflects the image upside down. This happens because being a concave surface the light waves hit the different parts of the spoon at different angles, so they’re all bent a little bit differently. By the time they come back to you, they’ve all bent differently in such a way that they end up making things look upside down.
Check out this Youtube video … it’s pretty darn cool!
Not only were these super cool science experiments but they provided us with plenty of opportunities to introduce new language to the children such as – refraction, concave, angles, substance, density and optical illusion!!!