Yes, we can have light without heat. The light from such reactions is called cool light. Many chemical reactions produce both light and heat. A burning candle is such a reaction. It is much less common for a chemical reaction to produce light without heat. Such chemical reactions are called chemiluminescent reactions, the most familiar of which occur in living …

Glowworm — Glowworm (or glow-worm) is the common name for various different groups of insect larvae and adult larviform females which glow through bioluminescence. They may sometimes resemble worms, but all are insects (Arachnocampa being a fly and all the others being beetles). The major families are: Lampyridae (fireflies), found around the world. The wingless adult female is the glowworm …

Firefly — Lampyridae is a family in the beetle order Coleoptera, members of which are commonly called fireflies, lightning bugs or (ambiguously) “glow worms” due to their conspicuous nocturnal (or, more accurately, crepuscular) use of bioluminescence to attract mates or prey. Fireflies are capable of producing a “cold light” containing no ultraviolet or infrared rays, with a wavelength from 510 …

Alphabetical Listing of Chemistry Acronyms (PI)SDCI — (pi)-electron Singly And Doubly Excited CI (SC)2(CI+PT2) — Self-consistent Size-consistent (CI+second-order Perturbation) (SC)2CI — Self-consistent Size-consistent CI 2DEG — Two-dimensional Electron Gas 2DHG — Two Dimensional Hole Gas 2MASS — Two Micron All-Sky Survey 2PH TDA — Two-particle-hole Tamm-Dancoff Approximation (for Closed-shell 2PPE — Two-photon Photoemission 3A — Alumina Aluminide Alloys 3DAP — …

What is the dry colour used in Holi Festival known as? Earlier Gulal was made out of dried seeds of flowers like the palash or flame of the forest. Dried silt from the riverbed was added to give it lustre. However, synthetic dyes are more in use these days. They are mixed with the fine dust of mica, which may …

List of initialisms, acronyms (“words made from parts of other words, pronounceable”), and other abbreviations used by the government and the military of the United States. Note that this list is intended to be specific to the United States government and military – other nations will have their own acronyms. US Army Acronyms: Used by United States Military Alphabetical Listing …

Holi, the festival of colours, is celebrated at a time when nature renews and refreshes herself. With a little care, we can do the same and also sustain our youth and beauty. The dry “Gulal” and the wet colours of today are not derived from natural sources. They contain chemicals, shiny particles of mica and even lead, which not only …

Acid rain was first noticed and studied in 1872. The formation of acid rain starts as soon as polluting chemicals namely nitrogen and sulphur oxides emissions from factories and car engines are sent up into the atmosphere. When these pollutants reach the atmosphere, they combine with existing water vapors, oxygen and sunlight. The reaction creates a diluted ‘soup’ of highly …

New research shows that hair turns grey as a result of a chemical chain reaction that causes hair to bleach itself from the inside out. The process starts when there is a dip in levels of an enzyme called catalase. Catalase shortfall means that the hydrogen peroxide that naturally occurs in hair can’t be broken down. So hydrogen peroxide builds …

It is a spoof on administration. Its official definition: Administratium is the heaviest element known to science and was recently discovered at a major US research university. The element has no protons or electrons and thus, has the atomic number 0. However, it does have one neutron, 125 assistant neutrons, 75 vice-neutrons and 111 assistant vice-neutrons, which gives it an …