discovery of positive rays or cannal rays

Since atoms on the whole are neutral, the presence of negatively charged electrons suggested the presence of positively charged particle..

When high electrical voltage is applied to a gas, its atoms break up into negatively charged particles (electrons) and positively charged particles. These positively charged particles formed by the removal of electrons from the gas atoms are called positive raysh..

Travel in straight lines: They cast a shadow of the objects placed in their way. Produce mechanical effect: A paddle wheel placed in their path starts rotating. Rays are positively charged: Anode rays are deflected towards the negative plate of an electric fiel..

Goldstein experimentally proved the existence of positive charge in matter. In his experiments, a perforated cathode was used in a discharge tube along with air at very low pressure of about 0.001 mm of mercury. When a high voltage of about 10,000 volts was applied to this cathode in the..

Sign Conventions and Rules for Drawing Ray Diagrams - These new cartesian sign conventions adopted during measurements are as follow..

Cathode rays travel in straight lines from the cathode to anode and cast shadow of the object placed in their path. (a) Cathode rays travel in straight lines. Cathode rays consist of an invisible stream of negatively charged particles. When the plates X and ..

Are Negatively ChargedWhen an electric field is applied in the path of cathode rays, they are deflected towards the positive plate of the electric field, which shows cathode rays are made up of negatively charged particles. The nature of the cathode rays does..

Discovery of Radioactivity and Nature of Radiations - In 1896, the phenomenon of radioactivity was accidentally discovered by French scientist Henri Becquerel. He was performing experiments with uranium compounds. He accidentally placed a crystal of potassium uranyl sulphate over photogra..

In 1885, Sir William Crookes carried out a series of investigations into the behaviour of metals heated in a vacuum. The experiment of Crookes and others showed that a heated cathode produced a stream of radiation, which could cause gases at low pressure to glow and which, make other substanc..

The discovery of the phenomenon of radioactivity was purely accidental. In 1896, Henry Becquerel, a French scientist accidentally found that in presence of salt of uranium, photographic plates got heavily fogged even though they were wrapped in opaque paper. He concluded that the ur..