Basic Forces of Nature Class 12 || Urdu Hindi [Best Lecture] скачать в хорошем качестве

Basic Forces of Nature Class 12 || Urdu Hindi [Best Lecture]

Fundamental force, also called fundamental interaction, in physics, any of the four basic forces—gravitational, electromagnetic, strong, and weak—that govern how objects or particles interact and how certain particles decay. All the known forces of nature can be traced to these fundamental forces. The fundamental forces are characterized on the basis of the following four criteria: the types of particles that experience the force, the relative strength of the force, the range over which the force is effective, and the nature of the particles that mediate the force. Gravitation and electromagnetism were recognized long before the discovery of the strong and weak forces because their effects on ordinary objects are readily observed. The gravitational force, described systematically by Isaac Newton in the 17th century, acts between all objects having mass; it causes apples to fall from trees and determines the orbits of the planets around the Sun. The electromagnetic force, given scientific definition by James Clerk Maxwell in the 19th century, is responsible for the repulsion of like and the attraction of unlike electric charges; it also explains the chemical behaviour of matter and the properties of light. The strong and weak forces were discovered by physicists in the 20th century when they finally probed into the core of the atom. The strong force acts between quarks, the constituents of all subatomic particles, including protons and neutrons. The residual effects of the strong force bind the protons and neutrons of the atomic nucleus together in spite of the intense repulsion of the positively charged protons for each other. The weak force manifests itself in certain forms of radioactive decay and in the nuclear reactions that fuel the Sun and other stars. Electrons are among the elementary subatomic particles that experience the weak force but not the strong force. #BaseAcademyPhysics #12thClassPhysics #AdeelAkhtar #NuclearPhysics Previous Videos Building Block of Matter in Urdu Hindi 👉   • Building Block of Matter || Elementary and...   Nuclear Reactor in Urdu Hindi 👉   • Nuclear Reactor Class 12 || Fission Reacto...