PHYSICS

In physics, motion is the change in position of an object with respect to its surroundings in a given interval of time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, and speed. Motion of a body is observed by attaching a frame of reference to an observer and measuring the change in position of the body relative to that frame. Motion along a line or a curve is called translation. Motion that changes the orientation of a body is called rotation. In both cases all points in the body have the same velocity and the same acceleration  The most general kind of motion combines both translation and rotation. Velocity is directed speed Acceleration is rate of change of velocity

Quantum mechanics  describes nature at the smallest scales of energy levels of atoms and subatomic particles. It is known by many names such as: • quantum physics • quantum theory • the wave mechanical mode l • matrix mechanics. Classical Physics    The physics existing before quantum mechanics, that is Classical physics, describes nature at ordinary or macroscopic scale. Most theories in classical physics can be derived from quantum mechanics as an approximation valid at large, or macroscopic scale. Quantum mechanics arose from theories explaining observations that couldn't be reconciled with classical physics. For example, Max Planck's solution in 1900 to the black-body radiation problem, and from the correspondence between energy and frequency in Albert Einstein's 1905 paper that explained the photoelectric effect. WHO GETS THE CREDIT? Early quantum theory was profoundly re-conceived in the 1920s by Erwin Schrödinger, Werner Heisenberg, Max Born...

Hello everyone! Have you ever heard about Special relativity?Its a remarkable theory published by the well known physicist Albert Einstein.I am sure you must have heard of him. Now lets know a bit more about special relativity. Special Relativity is the  accepted and  well-confirmed physical theory regarding the relationship between space and time or space-time. In Albert Einstein's original pedagogical treatment, it is based on two postulates.They are: 1.the laws of physics are invariant in all inertial systems / non-accelerating frames of reference. 2.the speed of light in a vacuum is the same for everyone, regardless of the motion of the source of the light. Special relativity is the most accurate model of motion at any speed when gravitational effects are negligible. But still, the Newtonian mechanics model is valid as a simple and high accuracy approximation at low velocities relative to the speed of light(c). Special relativity implie...