How Do You Know If A Frame Is Inertial? Hence, with respect to an inertial frame, an object or body accelerates only when a physical force is applied, and (following Newton’s first law of motion), in the absence of a net force, a body at rest will remain at rest and a body in motion
Where Is E Mc2 Used? PET scans and similar diagnostics used in hospitals, for example, make use of E = mc2. “Whenever you use a radioactive substance to illuminate processes in the human body, you’re paying direct homage to Einstein’s insight,” says Sylvester James Gates, a physicist at the University of Maryland. What is E
Who Said Everything Relative? A century ago, Albert Einstein taught us: everything is relative. The way you see the world depends on your point of view and context. Did Albert Einstein say everything is relative? In 1905, Albert Einstein based a new theory on two principles. … Everything is moving relative to everything else, hence
Why Does Light Travel So Fast? Ergo, light is made of electromagnetic waves and it travels at that speed, because that is exactly how quickly waves of electricity and magnetism travel through space. … With his special theory of relativity, Einstein realized the true connection between time and space, a unified fabric known as space-time.
Why Is Time A Concept? The concept of time is simply an illusion made up of human memories, everything that has ever been and ever will be is happening right now. That is the theory according to a group of esteemed scientists who aim to solve one of the universe’s mysteries. What is the concept
Why Galilean Transformation Is Failed? In the Galilean transformation, the speed cannot be equal to the speed of light. Whereas, electromagnetic waves, such as light, move in free space with the speed of light. This is the main reason that the Galilean transformation are not able to be applied for electromagnetic waves and fields. Are
What Was The Conclusion Of Michelson-Morley Experiment? The inescapable conclusion was that there was no aether after all. This conclusion was supported by Einstein’s postulate that the velocity of light was a universal constant, onto which no motion could be added. What do we conclude from the null results of Michelson-Morley experiment? The null result
Why Is Simultaneity Relative? theory of relativity implies that simultaneity is relative to a frame of axes. If one frame of axes is moving relative to another, then events that are simultaneous relative to the first are not simultaneous relative to the second, and vice versa. What does it mean when we say that simultaneity
Why Do We Believe In Time? We believe in time because it agrees with our observations, and furthermore plays a prominent role in our (very well empirically verified) physical theories of the universe. We would need a good reason to stop believing in time; an empty “what if?” question is not enough to cast doubt
Why Is Special Relativity Called Special? It is known as special relativity because it applies only to special cases: frames of reference in constant, unchanging motion. In 1915, Einstein published the general theory of relativity, which applies to frames that are accelerating with regard to each other. Time does not pass at the same rate