The sun emits sun rays it does not reflect them.
Gold-198 predominantly emits a mono-energetic gamma ray of energy 0.412 MeV. It also emits beta rays of much higher energy than that of gamma rays.
The Sun emits heat in the infrared wavelengths. The sidewalk is warmed by those direct rays.
No, the Sun mostly emits visible light rays. A small amount of gamma rays might be emitted, but they would be insignificant. Inside the Sun, gamma rays are produced but they never escape in that form. The super-heated gases around the sun in the chromosphere emit mostly higher energy xrays, UV rays but also some gamma rays. Natural gamma rays sources are thought to be the most energetic events in the Universe. Although Supernovae seem to be the source of some, others are still somewhat mysterious.
Nuclear reactors are dangerous because they emit ionizing radiation that damages the body. Nuclear reactors rely on fission so when the atom splits Uranium or Plutonium emits alpha particles, beta particles, x-rays, and gama rays. The most "dangerous" is gamma rays since they can cross though anything but layers of concrete and/lead
Emits (?)
Ultraviolet rays or infared rays
The sun emits sun rays it does not reflect them.
radioactivity
yes. the fallout also emits gamma rays.
Gold-198 predominantly emits a mono-energetic gamma ray of energy 0.412 MeV. It also emits beta rays of much higher energy than that of gamma rays.
When the nucleus emits an alpha or beta particle, it is in the exited state. To return to the ground state, it has to emit energy. It emits this energy in the form of gamma rays. There is no change in the atomic no or the mass no when it emits gamma rays, but it does decrease the energy in the nucleus when gamma rays are emitted
The capture creates a "hole", or missing electron, that is filled by a higher energy electron that emits X-rays.
The answer will depend on emissions from what? The sun, for example, emits light, uv rays and neutrinos.
That's what an atom emits when it decays.
The Sun emits heat in the infrared wavelengths. The sidewalk is warmed by those direct rays.
emit means to give off, to expel, to send out, or discharge; as of light, heat, or radiation, vapor, etc.; "The ozone layer blocks some harmful rays which the sun emits" Or "sour milk emits a bad odor".