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Motion is always relative. Based on the energy of the particle under motion, motions are classified into two types: Bounded Motion Unbounded Motion In bounded motion, the particle has negative total energy (E < 0) and has two or more extreme points where the total energy is always equal to the potential energy of the particle, i.e., the kinetic energy of the particle becomes zero. For eccentricity 0 ≤ e <1, E < 0 implies the body has bounded motion. A circular orbit has eccent...

The photoelectric effect is a phenomenon in which electrons are ejected from the surface of a metal when light is incident on it. These ejected electrons are called photoelectrons. It is important to note that the emission of photoelectrons and the kinetic energy of the ejected photoelectrons is dependent on the frequency of the light that is incident on the metal’s surface. The process through which photoelectrons are ejected from the surface of the metal due to the action of light is commonl...