Golden_hypatia.jpg (JPEG Image, 400x880 pixels) - Scaled (88%) Absolute hot. Absolute hot is a concept of temperature that postulates the existence of a highest attainable temperature of matter. Contemporary models of physical cosmology postulate that the highest possible temperature is the Planck temperature, which has the value 1.416785(71)×1032 kelvin.[3] This value is assumed to be the highest temperature because conventional quantum physics relies on Planck's law which implies a lower limit for the wavelength of electromagnetic radiation. The models of the origin of the universe based on the Big Bang theory assume that the universe has passed through this temperature about 10−42 seconds after the Big Bang as a result of enormous entropy expansion.[3] Above ~1032K, particle energies become so large that there is no existing scientific theory for the behavior of matter at these energies.
Gravitational forces between them would become as strong as other fundamental forces, requiring a hypothetical theory of everything for description.[4] See also[edit] Banana equivalent dose. A banana equivalent dose (abbreviated BED) is a unit of radiation exposure, defined as the additional dose a person will absorb from eating one banana. The concept is based on the fact that bananas, like most organic materials, naturally contain a certain amount of radioactive isotopes—even in the absence of any contamination due to human nuclear endeavors. The banana equivalent dose was meant to express the severity of exposure to radiation, such as resulting from nuclear power, nuclear weapons or medical procedures, in terms that would make sense to most people. History[edit] The concept probably originated on the RadSafe nuclear safety mailing list in 1995,[original research?] Where a value of 9.82×10−8 sieverts or about 0.1 μSv was suggested for a 150 gram banana.[1] Relationship with standard units[edit] The major natural source of radioactivity in plant tissue is potassium, which in nature contains 0.0117% of the unstable isotope potassium-40 (40K).
Criticism[edit] See also[edit] Basic Nuclear Science Information. Nuclear Structure | Radioactivity | Alpha Decay | Beta Decay |Gamma Decay | Half-Life | Reactions | Fusion | Fission | Cosmic Rays | Antimatter Nuclear Structure . An {*style:<a href='javascript:windowOpener('Glossary.html#Atom',%20'glossary');'>*}atom consists of an extremely small, positively charged {*style:<a href='javascript:windowOpener('Glossary.html#Nucleus',%20'glossary');'>*}nucleus surrounded by a cloud of negatively charged {*style:<a href='javascript:windowOpener('Glossary.html#Electron',%20'glossary');'>*}electrons. Although typically the nucleus is less than one ten-thousandth the size of the atom, the nucleus contains more than 99.9% of the mass of the atom!
Nuclei consist of positively charged {*style:<a href='javascript:windowOpener('Glossary.html#Proton',%20'glossary');'>*}protons and electrically neutral {*style:<a href='javascript:windowOpener('Glossary.html#Neutron',%20'glossary');'>*}neutrons held together by the so-called strong or nuclear force. Magenta Ain't A Colour. A beam of white light is made up of all the colours in the spectrum. The range extends from red through to violet, with orange, yellow, green and blue in between.
But there is one colour that is notable by its absence. You should have seen a green afterimage, but why is this significant? The afterimage always shows the colour that is complementary to the colour of the image. Complementary colours are those that are exact opposites in the way the eye perceives them. It is a common misconception that red is complementary to green. However, if you try the same experiment as above with a red image, you will see a turquoise afterimage, since red is actually complementary to turquoise. All the colours in the light spectrum have complements that exist within the spectrum – except green. The light spectrum consists of a range of wavelengths of electromagnetic radiation. When our eyes see colours, they are actually detecting the different wavelengths of the light hitting the retina. -Biotele. Nature by Numbers.