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Showing posts with the label KS4

Escape the Tamping Rod

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  The brain is the most complex structure we know, so studying and discovering how it works is complex. For many years scientists have had to rely on dissecting brains when they're dead (we hope), which means they're no longer working. Not an ideal way to discover how something works. Another strategy is to study what happens to a person when something goes wrong with their brain, which brings us to the unfortunate Phineas Gage. At approximately 4:30 on 13th September 1848, Gage was working at clearing rock for a new railway. He was preparing an explosive charge, using a long metal rod to pack the explosives into a hole drilled into the rock. A spark caused the charge to explode, propelling the rod up through his cheek and out through the top of his head. The rod was blown 25m away from the accident. Miraculously Gage survived this. Stories of his treatment following the accident are full of brain matter falling out of wounds and infections. The doctors could even see his '...

Escape from Orbit

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 You may of heard how Galileo got into trouble for claiming that the Earth orbits the Sun. Did you know there were others that were saying the same thing? In the 16th century, Johannes Kepler was one of these. He was an astronomer who took measurements of the stars, but also an astrologer, producing horoscopes for the rich and powerful. Back then, the lines between science and mysticism were blurred and Isaac Newton himself was as much an alchemist as a scientist.  Kepler took measurements of the movements of the planets, checking the measurements of other natural philosophers*. You can easily see planets with the naked eye, binoculars, or telescopes. They look like bright stars, but they move from night-to-night, giving them their name 'planetai' or 'wanderer'. Back in the 16th century six planets had been discovered.  Kepler's idea of how they moved in their orbits was mixed with some ideas that we may find strange today. He combined his measurements with ideas th...

Escape the Raindrops

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  Ever wondered how a rainbow forms? Raindrops act like a prism and split the light into the colours of the visible spectrum. The splitting is called dispersion. The splitting is caused by refraction. That's not the whole story though. After entering the raindrop, the light is reflected off the back surface. It then travels out of the front of the drop, refracting again at the boundary. If, when this light leaves the raindrop, it happens to travel to your eyes, you see the familiar bow in the sky. What this means is that nobody sees the same rainbow as you. A friend stood next to you sees the light that has been refracted in their direction. Ever heard of the famous double rainbow? They are formed when the light reflects twice inside the raindrop. Have you ever noticed that the colours in the second rainbow are reversed? The diagram above shows why. Other affects you may notice when you see a good rainbow are supernumerary bows (green and magenta bows underneath the other bows. The...

Escape the Spectre

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  The splitting of light when it travels into a prism is called dispersion. The splitting is caused by refraction. Refraction occurs when light moves from one material to another. Each wavelength of light is refracted through a different angle, so the colours separate. One of the most famous effects of dispersion is the rainbow. These are always good to see, but there are many more atmospheric light effects to look out for. In this image, you can see a halo around the sun, two sundogs (parhelia) on the left and right of the halo, an upper tangent arc (on top of the halo), a parhelic arc (going through the two sundogs) and infralateral arcs (far left and right of the image). These are all caused by ice crystals refracting light. Look  here  for some other light effects you may see in the atmosphere. I would really like to see the spooky Brocken Spectre. The light really is fantastic. Take up my escape challenge by clicking on the image below.

The First Challenge.

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Welcome to the first puzzle. In school, science is taught in separate topics. Sometimes these topics overlap. For instance, we study ants as part of biology. Imagine my amazement when I found out that a colony of ants know physics! Separate areas of science overlap in unexpected ways. So, click on the image to solve my puzzle and comment when you think you have the connection.