## Problem with Einstein’s Theory of Relativity

Einstein’s theory of relativity was beyond any doubt lovely, different from any other theory ever imagined by mankind. Newton described gravity merely as a force acting over a distance attracting any 2 masses, the force proportional to the product of the two masses and inversely proportional to the square of the distance between them. This…… Continue reading Problem with Einstein’s Theory of Relativity

## Relative Nature of Motion

Now we know that motion is a relative term.So absolute motion has no meaning, right? So aren’t Galileo’s view that earth moves around sun and the church’s old belief that sun moves around earth actually not equally correct or equally wrong? this is a question from hc verma’s concept of physics part 1.(from short answer…… Continue reading Relative Nature of Motion

## Mirror Mirror Relativity

Can you see your image when you are travelling at the speed of light? Visitors and students are requested to respond and answer via comments. Einstein’s Theory of relativity says:”The Laws of Physics are the same in any Inertial Frame of Reference.”

Published

## A question from Relativity

Can someone tell me how to derive
M = M_0/√(1 – v^2/c^2)
Emmanuel Gonzalez posted this.
The formula for relativistic mass (i.e. the mass of a body when it is moving with speeds comparable to the velovity of light in vacuum is given by)

## More on Cosmological constant

A constant introduced by Einstein  (1917) into the equations of general relativity to allow a steady state cosmological solution to the Einstein field equations. The constant was introduced before the concept of the Big Bang had been conceived, so an expanding or contracting universe  was regarded as physically implausible, leading Einstein to add as a…… Continue reading More on Cosmological constant

## Let's try to Understand the Theory of Relativity

Einstein’s theory of special relativity includes electricity and magnetism in a simple, logical extension of the relativity of Galileo and Newton. Its conclusions, including time dilation, length contraction, and E=mc2 have changed profoundly our ideas of time and space, matter and energy. Find more at http://www.phys.unsw.edu.au/einsteinlight/ The link will open in a new window.