In class we (me Toby and Jack)Have been learning the science of light as a group. Here are some of the things we learnt. Most of our research was done with UV beads here is a link about themhttp ://www.starlab-astronomy.co.nz/uvbead.htm
Did you know if you put sunscreen on UV beads they don't change colour because sunscreen protects against UV light e.g. If you don't put sunscreen on you get sunburnt. UV beads are like our skin as they change colour they are getting sunburnt but 30 seconds is like one hour in the sun. You know about sunscreen,well if you wrap tape around the UV beads it changes colour slower because it still gives a little bit of protection but not much.
Did you know that light can travel up to 299,972kph.Did you know that light usually travels in straight lines but light can still bend around corners.e.g.look at your shadow.light still travels around your head.it takes 8 minutes for light to get from the sun to earth which isn't long.
The sun is one of more than 100 billion stars in the Milky Way. It orbits some 25,000 light-years from the galactic core, completing a revolution once every 250 million years or so. The sun is relatively young, part of a generation of stars known as Population I, which are relatively rich in elements heavier than helium.
So light is an amazing thing it's fun learning about light. This doesn't take long to do .try some of your own experiments some of these experiments will be on my blog so click here.
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