Notes and Study material for Exams
Relation between focal length and redius of curvature The focal length (f) of a lens is the distance between the center of the lens and the point at which the reflected Light, of a beam of light travelling parallel to the center line, meets the center line (principal axis). The radius of curvature (r) is … Read more
Preliminary idea of medicine and its Classification Medicine is the field of Health and healing. It includes nurses, doctors, and various specialists. It covers diagnosis, treatment, and prevention of disease, medical research, and many other aspects of health. Medicine aims to promote and maintain health and wellbeing. Conventional modern medicine is sometimes called … Read more
IT applications- E-Cards, E-Shopping, E-Commerce E-Cards An electronic card (e-card) is a special occasion, greeting or post card created and customized within a website and sent through the Internet to the recipient. Customizations may include a wide variety of backgrounds and text fonts including some as cursive writing, graphic images, cartoon-style animations (proprietary to Adobe), … Read more
Microorganisms Microscopic organisms, commonly known as microorganisms or microbes, are found all around us and even inside our bodies. The category ‘Microbes’ includes a massive range of organisms including bacteria, Fungi, viruses, algae, archaea and protozoa. Some of these, such as bacteria and fungi, are well known, but others such as archaea much less so. … Read more
Allotropes of carbon Allotropy is the property of some chemical Elements to exist in two or more different forms, or allotropes, when found in nature. There are several allotropes of carbon. Diamond Diamond is probably the most well known carbon allotrope. The carbon atoms are arranged in a lattice, which is a variation … Read more
QUICK REVISION: NANOTECH AND ITS APPLICATION Definition:Nanoscience and Nanotechnology involves the concept of manipulating the extremely small things at nanoscale. At nanoscale things behave differently and this properties can be utilised across various fields of science like chemistry, biology, medicine, physics and material science. APPLICATION OF NANO ON Health SECTOR: Repairing of damaged … Read more
Diseases of Plants caused by viruses and their prevention Some of the same types of viruses that infect humans can also infect plants. Plants and humans do not transmit viruses to each other, but humans can spread plant viruses through physical contact. Most frequently, plants catch a cold when an insect or other … Read more
Uses and harms of bacteria and virus Harmful bacteria Pathogenic Bacteria These bacteria cause great losses to plant and animal population by causing several diseases. Reduction of
Conductors, semiconductors and insulators Materials are classified as conductors, insulators, or semiconductors according to their electric conductivity. The classifications can be understood in atomic terms. Electrons in an atom can have only certain well-defined energies, and, depending on their energies, the electrons are said to occupy particular energy levels. In a typical atom … Read more
Nuclear Energy Introduction Global energy demand continues to climb as the industrialized world’s energy use rises, millions pull themselves out of POVERTY in developing countries, and the world Population expands. Thus, the debate over the energy supply of the future intensifies. This debate is complicated by ongoing global Climate destabilization as a result of green … Read more