Bending of light rays from sharp edges of an opaque obstacle or aperture and its spreading in the geometricle shadow region is defined as diffraction of light or deviation of light from its rectilinear propogation tendency is defined as diffraction of light. Diffraction was discovered by Grimaldi & it was theoretically explained by Fresnel. Diffraction … Read more
COULOMB’S LAW: Two point electric charges q1 and q2 at rest, separated by a distance r exert a force on each other whose magnitude is given by If between the two charges there is free space then Where ε0 is the absolute electric permittivity of the free space and ε0 = 8.85 x 10-12 C2 … Read more
SPECIFIC PROPERTIES OF CHARGE • Charge is a scalar quantity : It represents excess or deficiency of electrons. • Charge is transferable : If a charged body is put in contact with an another body, then charge can be transferred to another body. • Charge is always associated with massCharge cannot exist without mass though … Read more
Charging of a body Charging can be done by two methods; 1. Conduction 2. Induction Ordinarily, matter contains equal number of protons and electrons. A body can be charged by transfer of electrons or redistribution of electrons. Charging by conductionThe process of charging from an already charged body can happen either by conduction or induction.Conduction … Read more
