nature of science scientists

Intensive investigation by scientists over the years led to the development of a mental model (the minuscule particles couldn't be actually seen at that time) known as 'dynamic particle model'. All matter is assumed to be made up of particles that are very small, which may be atoms, mole..

Structure of the Atom - The Structure of the Atom Scientific investigation on the structure of atom and its subatomic particles is an area where still absorbs scientists. In the process, they have discovered many more new subatomic particles, for example positron, meson, quarks etc. We wi..

The incident ray, the refracted ray and the normal to the surface at the point of incidence all lie in one plane. For any two given pair of media, the ratio of the sine of the angle of incidence to the sine of the angle of refraction is a constant. The above law is called Snell's law after the ..

. In 1793, he left for Manchester to teach physics and chemistry in a college. In 1801, he observed and discovered the law of expansion of gases on heating. He also enunciated the law of partial pressures and found methods of determining vapour pressure of gases. He invented the dew point hygromete..

Curium (Cm) after Pierre and Marie CurieFermium (Fm) after Enrico FermiEinsteinium (Es) after Albert EinsteinMendelevium (Md) after Dimitri Mendel..

Cells are isodiametric i.e. equally expanded on all sides They may be oval, round, polygonal or elongated Nucleus is present and hence living The cell walls are thin and made of cellulose Cytoplasm is dense with a single large vacuole Intercellular spaces may be present May cont..

The cells are long, narrow, thick and lignified, usually pointed at both ends The cell wall is evenly thickened with lignin and sometimes is so thick that the cell cavity or lumen is absent Nucleus is absent and hence the tissue is made up of dead cells They have simple, often oblique pi..

At present we know that the atom is the smallest particle of an element, which may or may not have independent existence. It is made up of sub-atomic particles like electrons, protons and neutrons. Atoms of one type of element differ from those of the other due to different number of sub-atomic par..

Nature of Light - Light is a form of energy and can be transformed into other forms of energy. You would have observed the path of 'a beam of light' inside a room. This beam is nothing but the scattered light produced by the dust particles. Beam of light becomes invisible if the room is d..