Photo electric effect

The photoelectric effect The photoelectric effect is the emission, or ejection, of electrons from the surface of, generally, a metal in response to incident light.A material that can exhibit The photoelectric effect is said to be photoemissive, and the ejected electrons are called photoelectrons. The process was discovered by Heinrich Hertz in 1887. Attempts to … Read more

Communication systems

Communication System  The word communication has been derived from Latin ward ―communis‖ which means common. Thus communication means sharing of ideas is common. It can be defined as exchange of facts, ideas, opinions or emotions between two or more persons to create a common ground of understanding.  Communication is the process of passing … Read more

Chemical kinetics

Chemical kinetics Chemical kinetics is that branch of chemistry which deals with the study of the speeds or the rates of chemical reactions, the factors affecting the rates of the reactions and the mechanism by which the reactions proceed. It concerns itself with the measurement of rates of reactions proceeding under the given conditions of … Read more

Social Reformers & Their Work AND Freedom fighters

      Rajaram Mohun   Laid stress on the study of English & established the Hindu College in Calcutta Roy   alongwith David Hare. Maharishi   The grandfather of Rabindranath Tagore. He inspired a number of thinkers like Devendranath   Ishwar Chandra Vidyasagar & Akshay Kumar Datta who became Brahmo Samaj Tagore   members.  … Read more

Civilization and Culture of the Pallavas

  The Pallava rule formed a golden epoch in the cultural history of south India. The period under the Pallavas was marked by considerable literary activities and cultural revival. The Pallavas warmly patronized Sanskrit language and most of the literary records of the time were composed in that language. Due to the cultural renaissance and … Read more

Revolutionary Terrorism and Bhagat Singh

Revolutionary young men did not try to generate a mass revolution. Instead they followed the strategy of assassinating unpopular officials 1904: VD Savarkar organized Abhinav Bharat Newspapers like The Sandhya and Yugaantar in Bengal and the Kal in Maharashtra advocated revolutionary ideology Kingsford Incident: In 1908, Khudiram Bose and Prafulla Chaki threw bomb at a … Read more

waves

Waves A wave can be described as a disturbance that travels through a medium from one location to another location.It is a disturbance or variation that transfers energy progressively from point to point. It may take the form of an elastic deformation, a variation of pressure, electric or magnetic intensity, electric potential, or temperature. When … Read more

Civil Disobedience Movement and Gandhi-Irwin Pact, 1931

Started by Gandhi on 12th March 1930 with the Dandi March. Reached Dandi on April 6. Defiance of forest laws in Maharashtra, Central Province and Karnataka. Refusal to pay chaukidari tax in Eastern India. Wide participation of women Khan Abdul Gaffar Khan organized Khudai Khidmatgars (aka Red Shirts) Nagaland: Rani Gaidilieu First RTC, 1930 Congress … Read more