Menu

Navigation

More options

Style variation

Contact us

Special and General Relativity Forum

Join in expert discussion on special and general relativity discussion. Relativity is the dependence of various physical phenomena on relative motion of the observer and the observed objects.

Prefix: Undergrad

Filters

Undergrad Who coined the term relativistic mass

Jun 24, 2008 · Replies 2 · Jun 24, 2008

Replies: 2

Views: 3K

Undergrad Gravity: Speed of Light & Black Holes

Apr 25, 2008 · Replies 68 · Jun 17, 2008

3

Replies: 68

Views: 14K

Undergrad Einsteins Genius Derivation: E=mc^2 and the Concept of Light as Matter

Jun 12, 2008 · Replies 11 · Jun 13, 2008

Replies: 11

Views: 3K

Undergrad Does Light Curving Around the Sun Prove It Has Weight?

Jun 9, 2008 · Replies 4 · Jun 11, 2008

Replies: 4

Views: 11K

Undergrad Light Speed and Newton's Equation F=ma: Explanation

May 10, 2008 · Replies 56 · Jun 7, 2008

2

Replies: 56

Views: 17K

Undergrad Albert Einstein 1911 "On the Influence of Gravity on Light

Mar 13, 2008 · Replies 5 · Jun 6, 2008

Replies: 5

Views: 8K

Undergrad What is the relationship between fields and mass in physics?

Jun 1, 2008 · Replies 8 · Jun 1, 2008

Replies: 8

Views: 3K

Undergrad EM Field Generation and Energy: A Simple Explanation

May 28, 2008 · Replies 9 · May 28, 2008

Replies: 9

Views: 2K

Undergrad Time and speed of light problem

May 22, 2008 · Replies 10 · May 23, 2008

Replies: 10

Views: 3K

Undergrad Is Faster Than Light Travel Possible?

May 20, 2008 · Replies 15 · May 22, 2008

Replies: 15

Views: 3K

Undergrad Velocity of Objects Relative to Speed of Light

May 22, 2008 · Replies 1 · May 22, 2008

Replies: 1

Views: 2K

Undergrad Is PBS's Layman Explanation of E=mc^2 Accurate?

May 15, 2008 · Replies 4 · May 17, 2008

Replies: 4

Views: 2K

Undergrad At what speeds does relativity become noticable?

May 14, 2008 · Replies 2 · May 15, 2008

Replies: 2

Views: 3K

Undergrad What do i need to know to move on to the Relativity ?

May 10, 2008 · Replies 4 · May 10, 2008

Replies: 4

Views: 2K

Undergrad Twin Paradox: Explaining Time Dilation and Length Contraction

May 9, 2008 · Replies 7 · May 10, 2008

Replies: 7

Views: 3K

Undergrad What Causes the Asymmetry in the Twin Paradox of Time Dilation?

Apr 30, 2008 · Replies 7 · May 7, 2008

Replies: 7

Views: 3K

Undergrad How Does General Relativity Affect Satellite Orbits and Time Dilation?

May 6, 2008 · Replies 2 · May 7, 2008

Replies: 2

Views: 2K

Undergrad Can Time Contract? Physics Teacher Bet

May 2, 2008 · Replies 29 · May 6, 2008

Replies: 29

Views: 6K

Undergrad Time Dilation: Gravity & Speed Effects

May 1, 2008 · Replies 24 · May 5, 2008

Replies: 24

Views: 6K

Undergrad Understanding Aether: What is it and What Does It Do?

May 1, 2008 · Replies 37 · May 5, 2008

2

Replies: 37

Views: 7K

Undergrad GPS & Relativity: Experiments & Simulations

May 5, 2008 · Replies 2 · May 5, 2008

Replies: 2

Views: 2K

Undergrad Why Can't Photons Have Rest Mass?

May 1, 2008 · Replies 7 · May 2, 2008

Replies: 7

Views: 3K

Undergrad What Is Einstein's Geometric Model of Gravitation?

Apr 30, 2008 · Replies 14 · Apr 30, 2008

Replies: 14

Views: 3K

Undergrad Photon Kinetic Energy: Wavelength & Frequency

Apr 29, 2008 · Replies 4 · Apr 30, 2008

Replies: 4

Views: 44K

Undergrad OK FINE, magnetism is explained away by relativity

Apr 24, 2008 · Replies 3 · Apr 27, 2008

Replies: 3

Views: 3K

Undergrad Does Mass Increase as Velocity Approaches the Speed of Light?

Apr 26, 2008 · Replies 5 · Apr 26, 2008

Replies: 5

Views: 3K

Undergrad Can Mass Be Transformed Into Energy?

Apr 9, 2008 · Replies 53 · Apr 21, 2008

2

Replies: 53

Views: 11K

Undergrad Understanding Velocity: The Perspective of Fish in a Tank

Apr 20, 2008 · Replies 3 · Apr 20, 2008

Replies: 3

Views: 2K

Undergrad Long planet and Galileo thought experiment

Mar 31, 2008 · Replies 71 · Apr 15, 2008

3

Replies: 71

Views: 17K

Undergrad From The Suns Core to The Corona?

Apr 13, 2008 · Replies 5 · Apr 13, 2008

Replies: 5

Views: 5K

Undergrad Deriving Law of Conservation of Energy from E=MC2

Feb 19, 2008 · Replies 21 · Apr 8, 2008

Replies: 21

Views: 13K

Undergrad Thought experiment on potential energy

Apr 5, 2008 · Replies 34 · Apr 8, 2008

2

Replies: 34

Views: 7K

Undergrad How does the speed of light affect the rotation of a disc?

Mar 31, 2008 · Replies 36 · Apr 6, 2008

2

Replies: 36

Views: 6K

Undergrad Creating a Common Frame of Reference for Remote Astronauts

Apr 2, 2008 · Replies 8 · Apr 6, 2008

Replies: 8

Views: 2K

Undergrad Can Anything Travel Faster Than the Speed of Light?

Apr 3, 2008 · Replies 5 · Apr 4, 2008

Replies: 5

Views: 3K

Undergrad Atomic clocks & general relativity

Apr 3, 2008 · Replies 10 · Apr 3, 2008

Replies: 10

Views: 4K

Undergrad Can You Take a Photo of Something Traveling at Light Speed?

Mar 29, 2008 · Replies 28 · Apr 2, 2008

Replies: 28

Views: 6K

Undergrad Is Time Dilation Only About Velocity and Massive Objects?

Apr 2, 2008 · Replies 3 · Apr 2, 2008

Replies: 3

Views: 3K

Undergrad Experiments in a revolving satellite

Mar 30, 2008 · Replies 6 · Apr 1, 2008

Replies: 6

Views: 3K

Undergrad Born Rigid Motion - references

Oct 19, 2006 · Replies 2 · Mar 31, 2008

Replies: 2

Views: 3K

Undergrad Twin Paradox: Jerry vs Tom's Time Dilation

Mar 30, 2008 · Replies 1 · Mar 30, 2008

Replies: 1

Views: 2K

Undergrad A question on special relativity

Mar 30, 2008 · Replies 1 · Mar 30, 2008

Replies: 1

Views: 2K

Undergrad Bending of Light: Other Observations Beyond Eddington

Mar 13, 2008 · Replies 7 · Mar 29, 2008

Replies: 7

Views: 3K

Undergrad Is Light's Gravity Influenced by Other Light?

Mar 26, 2008 · Replies 8 · Mar 28, 2008

Replies: 8

Views: 12K

Undergrad Does E=mc² fully account for an object's total energy including kinetic energy?

Mar 24, 2008 · Replies 16 · Mar 27, 2008

Replies: 16

Views: 4K

Undergrad Are Photons Massless But Still Have Momentum?

Mar 26, 2008 · Replies 1 · Mar 27, 2008

Replies: 1

Views: 2K

Undergrad Photon Mass: h/(lamda*c) Explained

Mar 18, 2008 · Replies 2 · Mar 23, 2008

Replies: 2

Views: 4K

Undergrad Is Magnetism Related to Einstein's Relativity?

Mar 18, 2008 · Replies 1 · Mar 18, 2008

Replies: 1

Views: 2K

Undergrad How Do Black Holes Exert Gravity If They Absorb Light?

Mar 14, 2008 · Replies 1 · Mar 14, 2008

Replies: 1

Views: 2K

Undergrad Deflection angle of a ray grazing the sun

Mar 14, 2008 · Replies 2 · Mar 14, 2008

Replies: 2

Views: 3K

Undergrad Why Is Time Considered the 4th Dimension in Einstein's Theory?

Mar 12, 2008 · Replies 5 · Mar 13, 2008

Replies: 5

Views: 3K

Undergrad Hypothesis about speed of light

Mar 6, 2008 · Replies 22 · Mar 8, 2008

Replies: 22

Views: 4K

Undergrad Relativity Questions: Answers for the Beginner

Mar 6, 2008 · Replies 3 · Mar 7, 2008

Replies: 3

Views: 3K

Undergrad Why Does the Speed of Light Remain Constant When Moving in an Airplane?

Mar 6, 2008 · Replies 3 · Mar 6, 2008

Replies: 3

Views: 2K

Undergrad Gravity and the earth's geometry

Mar 4, 2008 · Replies 3 · Mar 4, 2008

Replies: 3

Views: 2K

Undergrad A noob question about relativity.

Mar 1, 2008 · Replies 9 · Mar 2, 2008

Replies: 9

Views: 3K

Undergrad Information for the uninformed

Feb 26, 2008 · Replies 20 · Feb 27, 2008

Replies: 20

Views: 4K

Undergrad Noob with a question about lightspeed travel.

Feb 27, 2008 · Replies 7 · Feb 27, 2008

Replies: 7

Views: 3K

Undergrad Is the Relative Speed of Light Constant?

Feb 27, 2008 · Replies 12 · Feb 27, 2008

Replies: 12

Views: 3K

Undergrad Understanding the Train Experiment: Explaining Observers and Time Perception

Feb 19, 2008 · Replies 50 · Feb 26, 2008

2

Replies: 50

Views: 9K

Undergrad What is the required energy for reaching 99.99999c velocity?

Feb 24, 2008 · Replies 5 · Feb 25, 2008

Replies: 5

Views: 3K

Undergrad What Is the Importance of Understanding the 4th Dimension?

Feb 22, 2008 · Replies 5 · Feb 24, 2008

Replies: 5

Views: 4K

Undergrad Losing gravitational potentional energy

Feb 22, 2008 · Replies 5 · Feb 22, 2008

Replies: 5

Views: 2K

Undergrad Speed of Light and Flash Light

Feb 19, 2008 · Replies 2 · Feb 19, 2008

Replies: 2

Views: 2K

Undergrad Can you actually measure an object's velocity?

Feb 7, 2008 · Replies 14 · Feb 7, 2008

Replies: 14

Views: 3K

Undergrad No seriously; Can we, maybe, go to the past?

Feb 3, 2008 · Replies 4 · Feb 4, 2008

Replies: 4

Views: 3K

Undergrad Plot a point on Earth through the Universe

Feb 1, 2008 · Replies 6 · Feb 1, 2008

Replies: 6

Views: 4K

Undergrad What is the effect of relativity on measurements in a moving universe?

Jan 31, 2008 · Replies 8 · Feb 1, 2008

Replies: 8

Views: 3K

Undergrad Does gravity apply at very short distances?

Jan 30, 2008 · Replies 3 · Jan 30, 2008

Replies: 3

Views: 3K

Undergrad Time Dilation and space missions

Jan 17, 2008 · Replies 33 · Jan 28, 2008

2

Replies: 33

Views: 12K

Undergrad Preferred Coordinates: Definition & Overview

Jan 27, 2008 · Replies 9 · Jan 28, 2008

Replies: 9

Views: 6K

Undergrad Is it not possible to travel in light speed?

Jan 25, 2008 · Replies 5 · Jan 27, 2008

Replies: 5

Views: 4K

Undergrad The twins paradox and explanation

Dec 22, 2007 · Replies 22 · Jan 22, 2008

Replies: 22

Views: 6K

Undergrad What is the relative velocity of two observers with given object velocities?

Jan 13, 2008 · Replies 51 · Jan 20, 2008

2

Replies: 51

Views: 12K

Undergrad Relativity Stumper for you Einsteins

Jan 11, 2008 · Replies 9 · Jan 16, 2008

Replies: 9

Views: 3K

Undergrad Could a 6ft Object Hitting Earth at 99% Light Speed Destroy It?

Jan 7, 2008 · Replies 9 · Jan 8, 2008

Replies: 9

Views: 3K

Undergrad When the revolution of the earth on its axis accelerates

Jan 1, 2008 · Replies 1 · Jan 1, 2008

Replies: 1

Views: 5K

Undergrad What is the Smallest Constant Measurement of Time in the Universe?

Dec 9, 2007 · Replies 13 · Dec 31, 2007

Replies: 13

Views: 3K

Undergrad Can Black Holes Accelerate Objects to Light Speed?

Dec 30, 2007 · Replies 5 · Dec 31, 2007

Replies: 5

Views: 3K

Undergrad A Question About Special Relativity's Basics

Dec 25, 2007 · Replies 2 · Dec 27, 2007

Replies: 2

Views: 3K

Undergrad Understanding Light: Puzzled by Velocity?

Dec 26, 2007 · Replies 2 · Dec 27, 2007

Replies: 2

Views: 3K

Undergrad Calculating Relative Motion of A, B, & C: Agree?

Dec 26, 2007 · Replies 3 · Dec 27, 2007

Replies: 3

Views: 4K

Undergrad Why do we talk about speed of light in a vaccum?

Dec 16, 2007 · Replies 16 · Dec 26, 2007

Replies: 16

Views: 5K

Undergrad Clock Synchronization: Teaching Special Relativity

Dec 21, 2007 · Replies 10 · Dec 23, 2007

Replies: 10

Views: 5K

Undergrad Do Black Holes Expand at the Speed of Light?

Dec 16, 2007 · Replies 12 · Dec 19, 2007

Replies: 12

Views: 3K

Undergrad Would Dark Matter Make Us Invisible at High Speeds?

Dec 17, 2007 · Replies 2 · Dec 17, 2007

Replies: 2

Views: 3K

Undergrad Rotational Kinematics: Finding KE in SR

Apr 12, 2004 · Replies 24 · Nov 29, 2007

Replies: 24

Views: 10K

Undergrad Light Slowed to 70 Km/h: Causes & Effects

Nov 29, 2007 · Replies 3 · Nov 29, 2007

Replies: 3

Views: 4K

Undergrad Can somebody read this and tell me the flaw in the argument?

Nov 18, 2007 · Replies 11 · Nov 24, 2007

Replies: 11

Views: 4K

Undergrad Gravity/conservation of energy?

Nov 21, 2007 · Replies 2 · Nov 22, 2007

Replies: 2

Views: 6K

Undergrad Looking for complete explanation of logic behind relativity

Nov 10, 2007 · Replies 18 · Nov 15, 2007

Replies: 18

Views: 5K

Undergrad Einstein's papers translated to english?

Nov 14, 2007 · Replies 4 · Nov 15, 2007

Replies: 4

Views: 12K

Undergrad Does Hubble's Law violate special relativity?

Nov 13, 2007 · Replies 3 · Nov 14, 2007

Replies: 3

Views: 3K

Undergrad A rocket can't travel faster than the speed of light

Nov 12, 2007 · Replies 9 · Nov 14, 2007

Replies: 9

Views: 3K

Undergrad Speed's influence on space time

Nov 6, 2007 · Replies 2 · Nov 6, 2007

Replies: 2

Views: 3K

Undergrad Could someone me with a question about gravity?

Oct 31, 2007 · Replies 7 · Nov 1, 2007

Replies: 7

Views: 3K

Undergrad Fizeau, 1851, drag coefficinet

Feb 12, 2005 · Replies 2 · Oct 30, 2007

Replies: 2

Views: 3K

Undergrad Does kinetic energy vary by frame of reference?

Oct 28, 2007 · Replies 8 · Oct 29, 2007

Replies: 8

Views: 5K

Undergrad Relativistic Effects: Particle Accelerators & Speed of Light

Oct 21, 2007 · Replies 7 · Oct 23, 2007

Replies: 7

Views: 5K

Undergrad Understanding the Energy of Light: Unraveling the Mystery Behind 1/2mc^2

Oct 20, 2007 · Replies 9 · Oct 21, 2007

Replies: 9

Views: 3K

Relativity

The theory of relativity, formulated by Albert Einstein, comprises two fundamental theories—special and general relativity. Special relativity, proposed in 1905, redefines our understanding of space and time by asserting the constancy of the speed of light for all observers and introducing concepts like time dilation and length contraction.

General relativity, presented in 1915, extends these principles to incorporate gravity. It describes gravity as the curvature of spacetime caused by massive objects, leading to phenomena like gravitational time dilation and the prediction of black holes. Einstein's equations have been consistently validated through experiments and observations, profoundly influencing our comprehension of the universe's fabric and dynamics.

Top