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Problems for the 38th IYPT 2025 Approved by the IOC on 18 July 2024 Please refer to the official and signed pdf as the authoritative source. 1. Invent Yourself: Paper Boomerang Make a returning boomerang from a sheet of paper by folding and/or cutting. Investigate how its motion depends on relevant parameters. 2. Air Muscle Place a balloon inside a […]

It is no mystery that light is essential to human life. Since the discovery of fire, humans have developed various artificial light sources, such as incandescent lamps, gaslights, discharge lamps, and light-emitting diodes (LEDs). The distribution and intensity of artificial lights indoors are important factors that affect our ability to study and work effectively and influence our physical and mental health.

Recently, a research team from Pohang University of Science and Technology (POSTECH) has employed metasurfaces to fabricate angle-dependent holograms with multiple functions. This technology allows holograms to display multiple images based on the observer's viewing angle. The findings were published in Nano Letters.

A brief flash of green light was recently spotted coming from Venus in the night sky. The colorful shimmer has only been seen a handful of times before.

Ice crystals suspended in the air put on a gorgeous show if you know when and where to look

Emerging technologies for non-line-of-sight imaging can detect objects even if they are around a corner or behind a wall. In new work, researchers use a new type of detector to extend this method from visible light into near and mid-infrared wavelengths, an advance that could be especially useful for unmanned vehicles, robotic vision, endoscopy, and other applications.

Although radiation sounds scary, it isn't necessarily harmful. Here's what to know about the four types.

The most important feature of a black hole is that it has an event horizon: a region of space where the gravitational field is so strong that nothing, not even light, can escape from it. How, then…

It's said that once you've seen a green flash, you'll never go wrong in matters of the heart. Here's all you need to know to see one, plus great pics! The post What's a green flash and how can I see one? first appeared on EarthSky.

Invisible cloaks. Ghost imaging. Scientists are manipulating light in ways that were once only science fiction.

Since the scientists at Bell Labs invented the world's first transistor in December 1947, a revolution in microelectronics technology has profoundly affected lifestyles worldwide. As electronics get smaller and smaller, it is a challenge to find an easy, fast, and low-cost way to fabricate micro-nano components. Traditional direct writing fabrication methods such as mechanical scribing, focused ion beam etching,…

Do your soft contact lenses contain indications of PFAS "forever chemicals?" Mamavation sent 18 different pairs to the lab to find out!

Design a Newtonian telescope.

Article URL: https://en.wikipedia.org/wiki/Polarimeter Comments URL: https://news.ycombinator.com/item?id=35576313 Points: 1 # Comments: 0

Developed at Harvard, and successfully tested at Graz University of Technology (TU Graz), a revolutionary new meta-optics for microscopes with extremely high spatial and temporal resolution has proven its functional ability in laboratory tests at the Institute of Experimental Physics at TU Graz.

These may even be the worst declines in x86 CPU history.

Christopher Getschmann

Article URL: https://www.peterstefek.me/nerf.html Comments URL: https://news.ycombinator.com/item?id=34335152 Points: 1 # Comments: 0

A walkthrough of 46 lines of code that render a 3D ASCII donut using signed distance functions.

Researchers from the University of Tsukuba have shown how adding a tiny resonator structure to an ultrafast electron pulse detector reduced the intensity of terahertz radiation required to characterize the pulse duration.