from ELF waves to gamma radiation. Visible light is only a narrow part of the spectrum that is most familiar to us because our eyes can detect it. In the Newtonian model of the universe everything is made of particles, including light. Scientists began to think of light as being made fro...
Fundamental particles called quarks come in six different flavors. Protons are made of two up quarks and one down quark, while neutrons contain two down quarks and one up quark. (Image credit: MichaelTaylor | Shutterstock) Elementary particles are the smallest known building blocks of the ...
There is also such a thing asantimatter, which is not the same as dark matter. Antimatter consists of particles that are essentially the same as visible matter particles but with opposite electrical charges. These particles are called antiprotons and positrons (or antielectrons). When antiparticl...
A. They may produce light. B. They may produce sound. C. They may produce gamma rays or other high-energy particles. D. They may produce heat. 相关知识点: 试题来源: 解析 C。解析:“For example, when two dark matter particles collide, they may produce gamma rays or other high-energy...
Okay I clearly don’t know a lot of physics and even less quantum physics, but is it really fair to say that virtual particles are not particles and the Feynman diagram is not a “picture” of the physical phenomena because for any physical phenomena to be understood we have to, in...
could still speak to each other for the next two hours.The electricity was coming from the light in the sky.How was this possible?And what was the light in the sky? The light is called the aurora.Usually,you can see it only at the very north of the earth, (3) ...
Cosmic microwave background.This is the light, in the form of particles called photons, left over from about 380,000 years after the Big Bang. This light is a result of the conditions just after the Big Bang. It reflects the density and uniformity of the universe just after the Big Bang...
Many times a year, hundreds of celestial fireballs light up the night skies. They may be called shooting stars, but they don't really have anything to do with stars. These small space particles aremeteoroidsand they are literally celestial debris. ...
(That would be far too easy.) Instead, the primary theory of dark matter says that it is made of hypothetical particles called Weakly Interacting Massive Particles (WIMPs), which are about as well understood as their catch-all name implies. WIMPs don't even seem to interact with each other...
What are the parts of an atom?Most atoms have three different subatomic particles inside them: protons, neutrons, and electrons. The protons and neutrons are packed together into the center of the atom (which is called the nucleus) and the electrons, which are very much smaller, whizz around...