A second, more subtle issue had to do with the nature of the radiation. Scientists have known that atoms emit radiation, but they do so at very discrete, specific frequencies. An orbiting electron, if it followed this solar system model, would instead emit all sorts of wavelengths, contrary...
For electrons to break free of atoms, they need to absorb photons, the particles of electromagnetic radiation, with a certain amount of energy, the "ionization energy." This energy is different depending on what "shell" around an atom the electron occupies. Electrons on the outer shell are th...
How Nuclear Radiation Works describes protons, neutrons and electrons in some detail. For example, hydrogen atoms have one electron orbiting the nucleus. Helium atoms have two electrons orbiting the nucleus. Aluminum atoms have 13 electrons circling the nucleus. Each atom has a preferred number of ...
Does dark matter emit radiation? What is meant by "dark energy"? When was dark matter created? How do dark matter and dark energy work together? Does dark matter interact with baryonic matter? Where does dark energy come from? What is the study of dark matter called?
1920s, we had known through a variety of very cool experiments that the atom is made of a heavy, dense, positively charged nucleus surrounded by a swarm of tiny, light, negatively charged electrons. We also knew that these atoms could only absorb or emit radiation at very specific energies...
Why did Rutherford conclude that atoms contain a nucleus? Why can't a cyclotron accelerate electrons? Why can t a cyclotron accelerate neutrons? Are all baryons are protons? Why is californium radioactive? Why does a cyclotron produce radiation? Why are particle accelerators circular? Why does ...
Ultraviolet light air purifiers emit ultraviolet light, which is a type of electromagnetic radiation. Ultraviolet light is invisible to the human eye, but it can be seen using a black light. Ultraviolet light air purifiers use ultraviolet light to kill bacteria and viruses by damaging their DNA....
Within this type of nebula,a star energizes the atoms in the cloud with ultraviolet radiation. As these atoms fall back to lower energy states, they emit radiation. The process is similar to that of a neon light. This causes the nebula to glow. ...
In the world of stars, pollen-like particles seemingly fly and leap from body to body. Bee-like things gather, transport, and transfer encoded information through magnetic fields, along gravitational waves, from pulsars, magnetars, and galaxies whosecombined radiationthey emit generates and reinforce...
However, despite being so thin,we canstillsee graphenewith our naked eyes!Grapheneis the world’s most conductive material. The carbon atoms in graphine delocalise electrons, which allows them to move freely in the material. Concluding discussion ...