Department of Chemistry, A.S. College, Deoghar

Classical Works which led finally to transform ideas of Classical Mechanics into Quantum Mechanics & its applications:- 1.   The beginning of quantum theory was the discovery, by Max Planck, of the electromagnetic  energy quanta emitted  by a black body. The work was published under the title: “ Über   das Gesetz der Energieverteilung im Normalspektrum ”2  in Annalen der Physik , 4 (1901) 553. 2.      Four years later Albert Einstein published a paper “ Über die Erzeugung und Verwandlung des Lichtes betreffenden heuristischen Gesichtspunkt ” in  Annalen der Physik , 17 (1905)   132, in which he explained the photoelectric effect by assuming that the energy is  absorbed  by a metal as quanta of energy. 3.      In 1911 Ernest Rutherford discovered that atoms are   composed of a massive nucleus and electrons: “ The Scattering of the  α  and  β  Rays and the Structure o...

World Environment Day (also called as WED) has been started celebrating as an annual event on every 5th of June since 1973 in order to raise the global awareness about the importance of the healthy and green environment in the human lives, to solve the environmental issues by implementing some positive environmental actions as well as to make aware common public worldwide that everyone is responsible for saving his environment and not only somebody, government or organizations working for it. World environment day was first established to be celebrated every year by running some effective campaigns by the United Nations General Assembly and United Nations Environment Programme (UNEP) in the conference on Human Environment began from 5th to 16th of June at United Nations in 1972. It was first time celebrated in 1973 with the particular theme “Only one Earth”. Since 1974, the celebration campaign of the world environment day is hosted in different cities of the world. It is celebrated t...

                    As Chemistry is the study of the nature, properties and composition of matter, and how these undergo changes, it is referred to as the Central Science. Chemistry is the science about basic structure of substances, i.e what they are made of, how they interact and what role they play in living things. Everything we hear, see, smell, taste and touch involves chemistry and chemicals (matter). Chemistry plays a great role even in the air we breathe, the food we eat and the clothes we wear or imagine anything what we use in everyday life right from early morning to late night before we go to sleep or even while sleeping one may be using mosquito repellent. Chemistry and its innovations surrounds, envelops and touches our lives in all possible forms accepting global changes creating enormous challenges relating to human health ,energy, environmental pollution and scarce natural resources so one can visualise the vari...