Notes and Study material for Exams
Electromagnetic Wave Electromagnetic Wave are waves composed of undulating electrical fields and magnetic fields. The different kinds of electromagnetic waves, such as Light and radio waves, form the electromagnetic spectrum. All electromagnetic waves have the same speed in a vacuum, a speed expressed by the letter c (the speed of light) and equal to about … Read more
Ray Optics The wave model of Light has one serious drawback, though: Unlike other wave phenomena such as Sound, or surface waves, it wasn‟t clear what the medium was that supported light waves. Giving it a name – the “luminiferous aether” – didn‟t help. James Clerk Maxwell‟s (1831 – 1879) theory of electromagnetism, however, showed … Read more
Moving Charge and Magnetism Magnetism is a phenomenon produced by the motion of electric charge, which results in attractive and repulsive forces between objects. A magnet is any piece of material that has the property of attracting iron (or steel). Magnetite, also known as lodestone, is a naturally occurring rock that is a magnet. This … Read more
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
Here is a list of subtopics without any description for Insolation and Heat Budget: Albedo Atmospheric absorption Atmospheric Greenhouse Effect Earth’s energy budget Electromagnetic radiation Greenhouse gases Insolation Latent heat Net radiation Outgoing longwave radiation Radiative forcing Shortwave radiation Solar constant Stefan-Boltzmann law Surface albedo Thermal radiation Terrestrial radiation The Earth’s energy budget is the … Read more
The impact of radiation from mobile phone towers on human beings and wildlife is a complex and controversial issue. There is no scientific consensus on the long-term effects of exposure to low-level radiofrequency radiation, but some studies have suggested that it may be harmful. The following are some of the subtopics that are often discussed … Read more