Kinetic energy is the energy of motion. An object that has motion – whether it is vertical or horizontal motion – has kinetic energy. There are many forms of kinetic energy – vibrational (the energy due to vibrational motion), rotational (the …
If an object moves relative to a reference frame—for example, if a bus moves in the forward direction relative to the road, or a passenger moves toward the driver of a bus—then the object’s position changes. This change in position …
The basic definition of Optics is to study the properties of light and it’s propagation through different media and its effects. Ray optics and Optical instruments is a one of important and interesting concept in CBSE Class 12 Physics. Reflection …
Semiconductor Electronics is one of the concepts of physics in CBSE Class 12. Before knowing about semiconductors on should know what materials are. In terms of electricity, there are two types of Materials namely, Conductors and non-conductors. Conductors will conduct …
Atoms are building blocks of matter which consists of Protons, neutrons, and Electrons. Protons and neutrons are in one region that is called as nucleus but an electron revolves around the nucleus in fixed orbits. The best example is watermelon …
Free Electrons move randomly in a conductor due to attraction of positive charges. So some energy is required to emit electrons from metal surface. Minimum energy is required to emit the electrons on the surface of conductor. This minimum energy …
The Definition of Photo electric effect given in above article. The phenomenon of emission of electrons from a metallic surface by the incidence of light (photons) is known as photoelectric effect. The emitted electrons are called photoelectrons. The below picture …
Hertz, in 1887 discovered the phenomena of photoelectric effect for the first time. He was experimenting on the generation of electromagnetic waves by spark discharge and he noticed that sparks around the detector loop were intensified when ultraviolet radiation fell …