A flood of matter and radiation, known as "reheating," began populating our universe with the stuff we know today: particles, atoms, the stuff that would become stars and galaxies. This all ...

We say that it becomes ‘excited’. An electron can be excited when its absorbs energy from electromagnetic radiation. Different changes in energy level need different frequencies of ...

It doesn't interact with baryonic matter and it's completely invisible to light and other forms of electromagnetic radiation, making dark matter impossible to detect with current instruments.

Space is more than just emptiness. It contains a mix of particles, radiation, magnetic fields and mysterious forms of matter ...

Particle physics is the study of the elementary building blocks of matter and radiation and their interaction. The fundamental particles are summarised by the standard model. This includes leptons ...

In our context it refers to "ionizing" radiation, which means that because such radiation passes through matter, it can cause it to become electrically charged or ionized. In living tissues, the ...

In their ability to penetrate matter and displace electrons in atoms and molecules, the various forms of this radiation have deep significance for science, technology and the future of man ...

There are trillions of charged particles—protons and electrons, the basic building blocks of matter—whizzing around above ...

This collaborative work sheds new light on solar radiative opacity, a crucial physical quantity for understanding the interaction between matter and radiation in the extreme conditions of the Sun ...

Both mechanical and electromagnetic waves will transfer energy but not matter. Light and sound waves ... Sample exam questions - radiation and waves - OCR 21st Century Understanding how to ...

When some people think of radiation, atomic blasts and danger come to mind because exposure to very high levels can cause serious health issues and even death. But the energy given off by matter ...

Dark matter is more than five times as abundant as all the visible matter in the universe. So why can't we see any of it?