Of all the elementary particles that we know of, neutrinos are the least harmful of them all. All charged particles, like electrons, protons, etc do interact and in sufficient quantities can be harmful. Even some neutral particles like gamma rays or neutrons can be harmful since they have stronger interaction rates.
Q. How do we know dark matter exists?
Scientists study dark matter by looking at the effects it has on visible objects. Scientists believe that dark matter may account for the unexplained motions of stars within galaxies. Chandra observed a cluster of galaxies called Abell 2029 located about a billion light-years from Earth.
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Q. What is dark matter made of?
Dark matter can refer to any substance which interacts predominantly via gravity with visible matter (e.g., stars and planets). Hence in principle it need not be composed of a new type of fundamental particle but could, at least in part, be made up of standard baryonic matter, such as protons or neutrons.
Q. Where do neutrinos come from?
Neutrinos are fundamental particles that were first formed in the first second of the early universe, before even atoms could form. They are also continually being produced in the nuclear reactions of stars, like our sun, and nuclear reactions here on earth.
Q. What is the use of neutrinos?
The visible light that reaches earth from the sun is emitted from the surface of the sun. The neutrinos which also take close to this time to reach us from the sun, known as solar neutrinos, were produced in the core of the sun. Therefore they give us information about the interior of the sun.
Q. Can we create neutrinos?
Neutrinos do not have an electric charge, so they cannot be focused or accelerated using electric and magnetic fields, and thus it is not possible to create a parallel, mono-energetic beam of neutrinos, as is done for charged particles beams in accelerators.
Q. How fast do neutrinos travel?
The lowest-energy neutrinos we’ve ever detected have so much energy that their speed must be, at minimum, 99.99999999995% the speed of light, which means that they can move no slower than 299,792,457.99985 meters-per-second.
Q. What Tachyon means?
A tachyon (/ˈtækiɒn/) or tachyonic particle is a hypothetical particle that always travels faster than light. Most physicists believe that faster-than-light particles cannot exist because they are not consistent with the known laws of physics.
