Monday, December 23

Tag: light

School of Rock: The Physics of Waves on Guitar Strings
16Dec By adminNo Comments
Technology

School of Rock: The Physics of Waves on Guitar Strings

The rubber band example does indeed have two nodes—they are at the ends of the rubber band where your fingers hold it. We only have half a wavelength in the standing wave, but there is indeed a relationship between the length of the rubber band and the size of the wavelength.Guitar StringsIt's time to put all these ideas together and look at a guitar string. Once you hit that string, it's going to create a standing wave with an antinode in the middle and two nodes on the ends. This is called the first harmonic wave.It's possible to also produce a second harmonic wave (with a node in the middle) and even higher harmonics. However, because of drag forces on the string, these higher frequencies die out fairly quickly so that you are just left with a standing wave that has a wavelength equal ...
Read More
An Invisible ‘Demon’ Lurks in an Odd Superconductor
4Dec By adminNo Comments
Technology

An Invisible ‘Demon’ Lurks in an Odd Superconductor

A few years ago, the researchers decided to put a superconducting metal called strontium ruthenate in their crosshairs. Its structure is similar to that of a mysterious class of copper-based “cuprate” superconductors, but it can be manufactured in a more pristine way. While the team didn’t learn the secrets of the cuprates, the material responded in a way that Ali Husain, who had refined the technique as part of his doctorate, didn’t understand.Husain found that ricocheting electrons were sapped of their energy and momentum, which indicated that they were setting off energy-draining ripples in the strontium ruthenate. But the waves defied his expectations: They moved 100 times too quickly to be sound waves (which ripple through atomic nuclei) and 1,000 times too slowly to be charge waves ...
Read More
15 Best Smart Home Lighting (2023): Decorative Panels, LED Strips, and Ambient Lamps
20Oct By adminNo Comments
Technology

15 Best Smart Home Lighting (2023): Decorative Panels, LED Strips, and Ambient Lamps

There are tons of smart ambient lighting panels. Here are a few we also like.Twinkly Dots for $100: You can stick these strings of LED dots around frames and furniture or have them hanging somewhere, and the app offers a wide range of colors and animated effects. You can map your pattern to make the most of the effects, create your own effects, and group Twinkly lights together. On the downside, the strip is split into two sections, with the power controls in the center, and you don’t get enough adhesive dots in the box.Govee G1 Gaming Light Strip for $60: This is very similar to the Philips Hue Play Gradient Lightstrip for PC listed above, but not quite as good. It is easy to fit, comes in two sizes (for monitors 24 to 26 inches and 27 to 34 inches), and brightens up your gaming. But it ...
Read More