Tomorrow (August 12), many countries will be able to see a solar eclipse. For us in the UK, it's expected to hit at around 6 pm, but this could differ depending on where in the world you live. A quick ...
In this article, I'll show you how to make an awesome "Death Ray" using the large magnifying lens from an old projection TV. The lens is called a Fresnel lens; a device that employs several ridges to ...
A good, safe and easy way of observing the Sun or a solar eclipse is to make a solar projection screen. The solar projection technique described here can be traced back to Galileo. Providing care is ...
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