This is a simple build of a Michelson Interferometer using the SpyNet Laser Tripwire . About a year ago, I accidentally came across this toy and noticed that it has a red laser and two adjustable…

Scientists at the synchrotron PETRA III have investigated X-ray absorption of highly charged iron ions.  Highly charged ions - that is, atoms which have been stripped of most of their electrons…

Oak Ridge National Laboratory researchers have developed a new oxygen “sponge” that can easily absorb or shed oxygen atoms at low temperatures.  Materials containing atoms that can switch back…

In my previous article, you learned how to use the 555 test circuit as a cable tester. It can also be used to test whether different materials conduct or don’t conduct electricity such as plastic,…

In my previous article, you learned how to build a hot liquid level indicator for the vision impaired to help them fill cups with hot liquids such as tea or coffee. The 555 test circuit was used to…

In my previous article, you learned how to build the “The 555 Test Circuit.” We are going to modify the test circuit to create a hot liquid level indicator for the vision impaired to help them fill…

Researchers can argue about the accuracy of old thermometers and how to pick the datapoints of numerical models, but radio waves can help clear some things up. The ionosphere, one of the regions of…

Snap Circuits is an educational toy that teaches electronics with solderless snap-together electronic components. Each component has the schematic symbol and a label printed on its plastic case…

By the time Sandy hit New Jersey and New York, it had been reduced to a tropical storm but its rare angle of approach still meant a lot of devastation. Environmentalists in New York are resistant to…

You have noticed the way water flows around boulders in a fast-moving river, creating areas of stillness and intense motion. It's possible to control the forces of fluid flow at the smallest levels…