Author: Gk Scientist

Sodium Vapour Lamp

Sodium Vapour Lamp: Construction: It consists of two glass tubes, an outer glass tube and an inner glass tube. The inner glass tube contains two electrodes. Sodium along with a small quantity of neon or argon gas is filled in an inner tube to make discharge self-starting. Sodium vapour is chemically very active. The glass of …

Function of Education in Human Life

Function of Education in Human Life: M . L. Jacks has rightly observed, “There is plenty of work for education to do……….Education must enable the child to think himself, to respect hard work, to have good fellowship, to have taste and sense of eternal realization”. The functions of education may be divided into the following two …

Pragmatism and Curriculum

Pragmatism and Curriculum: Pragmatists do not believe in any fixed curriculum or a curriculum wherein there would be watertight compartmentalization of knowledge into different subjects nor do they support a Laissez-fare policy in curriculum organisation. To them that knowledge and those subjects are acceptable which solve the problems of life. Brubacher says, “The curriculum must not …

Dispersion of Light

Dispersion of Light: When a narrow beam of white light is allowed to pass through a prism, a beautiful pattern of colours appears on the screen, this shows that white light consists of a number of components each of which causes a particular sensation of colour. We know that light travels in waves and the components …

Extrinsic Semiconductor

Extrinsic Semiconductor: Definition- A semi-conductor with suitable impurity atoms added to it, is called an extrinsic semiconductor. It is of two types- N-Type Semiconductor. P-Type Semiconductor. N-Type Semiconductor: When atoms from Group V of the periodic table (example- As, P etc.) are added to a pure semiconductor, we get an N-type semiconductor. The group V, atoms …

Idealism and Curriculum

Idealism and Curriculum: Since the aims of education according to idealism are to produce an “ideal man”, so, while forming a curriculum, idealists attach more importance to thoughts, feelings, ideals and values than to the child and his activities. These ideals already exist in the world, only man has to discover them through the aid of …

Mechanism of a Reaction

Mechanism of a Reaction: A series of step reactions or elementary reactions proposed to account for the overall reaction is called the mechanism of a reaction. It is not an easy task and requires the experience and indignity of the person. The necessary condition for a reaction mechanism is that it must lead to the correct …