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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.

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Graduate Understanding Special Relativity: Counter Rotating Frames in Motion

DW
Jun 15, 2004 · Replies 5 · Jun 22, 2004

Replies: 5

Graduate String theory verses Special Relativity

Dlockwood
Jun 21, 2004 · Replies 3 · Jun 21, 2004

Replies: 3

Graduate Conundrum Regarding the Lack of an Absolute Frame of Reference

loseyourname
Jun 13, 2004 · Replies 49 · Jun 21, 2004

2

Replies: 49

Graduate Do spinning disks perpendicular to acceleration show relativity effects?

geistkiesel
Jun 13, 2004 · Replies 26 · Jun 21, 2004

Replies: 26

Graduate What is the relative speed of photons?

StarThrower
Apr 7, 2004 · Replies 100 · Jun 20, 2004

4

Replies: 100

Graduate Is It Possible to Escape a Black Hole Using Charge?

Narcissus
Jun 18, 2004 · Replies 5 · Jun 18, 2004

Replies: 5

Undergrad Two Questions about Black Holes and Laws of Physics

mrjeffy321
Jun 17, 2004 · Replies 4 · Jun 18, 2004

Replies: 4

Graduate GPS satellite system calculations and relativity

Doctordick
Jun 8, 2004 · Replies 45 · Jun 18, 2004

2

Replies: 45

Graduate Why is energy-momentum symmetry important in special relativity?

krab
May 27, 2004 · Replies 72 · Jun 16, 2004

3

Replies: 72

Graduate Maximum distance into the future using relativity of simultaneity

loseyourname
Jun 8, 2004 · Replies 2 · Jun 15, 2004

Replies: 2

Graduate Multiple Big Bangs: Could Symmetry Explain Quantum 'Spookieness'?

Reflector
Jun 8, 2004 · Replies 5 · Jun 15, 2004

Replies: 5

Graduate Motion and perception: does relativity fail?

wespe
May 21, 2004 · Replies 236 · Jun 14, 2004

8

Replies: 236

Graduate Is Acceleration Relative Or Absolute

StarThrower
Dec 21, 2003 · Replies 21 · Jun 14, 2004

Replies: 21

Graduate Can Spinors Bridge the Gap Between Quantum Mechanics and General Relativity?

Tom McCurdy
Jun 11, 2004 · Replies 28 · Jun 14, 2004

Replies: 28

Graduate The Derivative of Lorentz Transformation

Hyperreality
Jun 6, 2004 · Replies 2 · Jun 14, 2004

Replies: 2

Graduate Gravitationally accelerated electron

ardenbook
Jun 13, 2004 · Replies 3 · Jun 13, 2004

Replies: 3

Messages from the Future: Is Time Travel Possible?

HIGHLYTOXIC
Jun 13, 2004 · Replies 3 · Jun 13, 2004

Replies: 3

Graduate Can Gravity Escape a Black Hole Faster Than Light?

Reflector
Jun 10, 2004 · Replies 5 · Jun 12, 2004

Replies: 5

Graduate SR Simultaneous Lines Drawn in the Sand

geistkiesel
Jun 8, 2004 · Replies 159 · Jun 11, 2004

6

Replies: 159

Graduate Inertial reference frames

kurious
Jun 10, 2004 · Replies 2 · Jun 11, 2004

Replies: 2

Graduate Can light be instantaneous and yet measured as 'c'?

Scott Sieger
Jun 8, 2004 · Replies 9 · Jun 11, 2004

Replies: 9

Graduate Does the Michelson-Morley Experiment Support the Constant Speed of Light Theory?

OneEye
Jun 1, 2004 · Replies 21 · Jun 10, 2004

Replies: 21

Undergrad What is stress-energy and how does it differ from other forms of energy?

taylordnz
May 18, 2004 · Replies 20 · Jun 9, 2004

Replies: 20

Graduate (1 - 2 GM/ r c^2) ^ 1/2 and Big Bang

kurious
Jun 7, 2004 · Replies 5 · Jun 8, 2004

Replies: 5

Graduate Question: Can Gravity Accelerate Beyond the Speed of Light?

matt_dabbs
Jun 7, 2004 · Replies 2 · Jun 7, 2004

Replies: 2

Graduate Where's the error in my derivation of E=mc²?

Alkatran
Jun 6, 2004 · Replies 4 · Jun 7, 2004

Replies: 4

Graduate Are electric charges the only unchanging entities in the universe?

kurious
May 26, 2004 · Replies 2 · Jun 7, 2004

Replies: 2

Graduate Acceleration by the Casimir effect: violation of relativity?

Loren Booda
May 26, 2004 · Replies 27 · Jun 6, 2004

Replies: 27

Time travel into future possible

bozo the clown
Jun 2, 2004 · Replies 9 · Jun 6, 2004

Replies: 9

Undergrad What Did Einstein Imagine When Riding on a Beam of Light?

chasingwind
May 17, 2004 · Replies 9 · Jun 5, 2004

Replies: 9

Graduate Experiment to determine if OWLS is same

wespe
Jun 4, 2004 · Replies 2 · Jun 4, 2004

Replies: 2

Graduate Time dilation in muon decay at 0.98c using Lorentz transform

robert Ihnot
Jun 1, 2004 · Replies 5 · Jun 3, 2004

Replies: 5

Graduate Why does substituting v=x/t into the Lorentz transform give 0/0?

OneEye
May 26, 2004 · Replies 22 · May 31, 2004

Replies: 22

Undergrad Could slowing light down enable time travel?

Palmer
Mar 24, 2004 · Replies 12 · May 30, 2004

Replies: 12

Graduate Why Don't Light Beams Add to Double the Speed?

KingNothing
May 29, 2004 · Replies 5 · May 30, 2004

Replies: 5

Graduate Mass and Curved Space Question

Dorje
May 21, 2004 · Replies 2 · May 28, 2004

Replies: 2

Undergrad Can a Strong Cable Connect Planets Faster Than the Speed of Light?

physicskid
May 27, 2004 · Replies 7 · May 28, 2004

Replies: 7

Graduate Einstein's Twin Paradox: Age Difference on a Rocket at the Speed of Light

General_Relativity19
May 27, 2004 · Replies 5 · May 27, 2004

Replies: 5

Undergrad A MACHO is passing the solar system at the velocity of .5c.

OneEye
May 26, 2004 · Replies 8 · May 27, 2004

Replies: 8

Graduate Positively and Negatively Curved Space-time

Silverious
May 25, 2004 · Replies 8 · May 27, 2004

Replies: 8

Graduate The concept of mass in relativity

pmb_phy
May 26, 2004 · Replies 6 · May 26, 2004

Replies: 6

Graduate Light Deflection: Newton vs Relativity

kurious
May 24, 2004 · Replies 5 · May 26, 2004

Replies: 5

Graduate Q'izing GR retains local Lorentz invariance after all?

marcus
Oct 10, 2003 · Replies 4 · May 26, 2004

Replies: 4

Graduate Is time real or just a human measurement system?

SeveredNebula223
May 23, 2004 · Replies 6 · May 25, 2004

Replies: 6

Graduate Six questions on time dilation in special relativity

energia
May 21, 2004 · Replies 3 · May 25, 2004

Replies: 3

Graduate Time and velocity relative to the galactic center

Francium
May 17, 2004 · Replies 32 · May 25, 2004

2

Replies: 32

Time travelling - Einstein's revolution

12345
May 23, 2004 · Replies 11 · May 24, 2004

Replies: 11

Graduate Where and when do length and time dilation occur in special relativity?

chris_tams
May 24, 2004 · Replies 3 · May 24, 2004

Replies: 3

Graduate Is the relativity postulate of simultaneity reasonable?

geistkiesel
May 11, 2004 · Replies 9 · May 24, 2004

Replies: 9

Graduate Dr. Aphos derives relativity from sound instead of light

OneEye
May 13, 2004 · Replies 23 · May 24, 2004

Replies: 23

Undergrad Is it possible to time travel according to Einstein's theory?

Razi Abid
May 24, 2004 · Replies 2 · May 24, 2004

Replies: 2

Graduate Is Time Relative or Absolute in Spacetime?

Olias
May 5, 2004 · Replies 4 · May 24, 2004

Replies: 4

Graduate Deriving Energy in Special Relativity: The Principle of Extremal Aging

H-bar None
May 22, 2004 · Replies 3 · May 23, 2004

Replies: 3

Graduate Geometrodynamics Theory: Understanding Time and Length Dilation

Växan
May 22, 2004 · Replies 2 · May 22, 2004

Replies: 2

Graduate Is the Doppler effect responsible for redshifted photons and time dilation?

kurious
May 19, 2004 · Replies 2 · May 21, 2004

Replies: 2

Graduate Time dilation and the big bang

shrumeo
Jan 12, 2004 · Replies 27 · May 20, 2004

Replies: 27

Graduate What Is Background Independent Physics and How Does It Change Geometry?

jby
May 19, 2004 · Replies 6 · May 20, 2004

Replies: 6

Graduate Is Time Travel Possible Through Mental Projection?

Noah
Apr 29, 2004 · Replies 44 · May 20, 2004

2

Replies: 44

Graduate Why doesn't relativity of simultaneity make the twin paradox symmetric?

AndyCiep
May 5, 2004 · Replies 11 · May 19, 2004

Replies: 11

Graduate Astronomy says light slows down.

meddyn
Feb 14, 2004 · Replies 4 · May 18, 2004

Replies: 4

Graduate The velocity of light is constant?

Amphi
May 13, 2004 · Replies 17 · May 17, 2004

Replies: 17

Graduate Twinship, an attempt to understand SR

rtharbaugh1
Apr 11, 2004 · Replies 16 · May 17, 2004

Replies: 16

Graduate Is there only one possible future? Is free will an illusion?

Undomiel
May 17, 2004 · Replies 3 · May 17, 2004

Replies: 3

Graduate Four vectors and Lorentz invariance

electronman
May 9, 2004 · Replies 2 · May 16, 2004

Replies: 2

Graduate How Does Photon Doppler Shift Work in Radar Design?

ckirksey
Mar 31, 2004 · Replies 3 · May 15, 2004

Replies: 3

Graduate Time and Indeterminacy vs. Continuity

Tesla
Oct 14, 2003 · Replies 14 · May 13, 2004

Replies: 14

Undergrad What happened to Dr. Mallet's time machine project?

strubenuff
Apr 29, 2004 · Replies 30 · May 12, 2004

2

Replies: 30

Graduate Gravitational & Inertial Mass: Why the Difference?

JasonRox
May 9, 2004 · Replies 6 · May 11, 2004

Replies: 6

Graduate Velocity Calculation with c^2 Substitution

ccb056
May 5, 2004 · Replies 4 · May 11, 2004

Replies: 4

Graduate The Path of Light from Distant Galaxies: With or Without Dark Matter and Energy?

mee
May 10, 2004 · Replies 3 · May 10, 2004

Replies: 3

Graduate What is Mach's Principle and its significance in modern physics?

einstein_vishnu
May 5, 2004 · Replies 8 · May 10, 2004

Replies: 8

Graduate Is the Transverse Doppler Effect Dependent on General Relativity?

arildno
May 8, 2004 · Replies 3 · May 9, 2004

Replies: 3

High School What is the definition of a black hole?

Guy From Alberta
Apr 3, 2004 · Replies 40 · May 8, 2004

2

Replies: 40

Graduate How Could Naked Singularities Exist Beyond the Event Horizon?

Tail
May 7, 2004 · Replies 4 · May 8, 2004

Replies: 4

Graduate Time as energy transfer cycles affected by gravity and velocity

AWolf
Apr 30, 2004 · Replies 15 · May 8, 2004

Replies: 15

Graduate GR and SR and the speed of change

Scott Sieger
Apr 29, 2004 · Replies 16 · May 8, 2004

Replies: 16

Graduate Nature of the cosmological constant

hellfire
May 7, 2004 · Replies 6 · May 8, 2004

Replies: 6

Graduate Question on simultaneous events.

lky
Feb 5, 2004 · Replies 64 · May 7, 2004

3

Replies: 64

Graduate What is a hypersphere and how can we comprehend its time dimensions?

billy_boy_999
May 5, 2004 · Replies 3 · May 6, 2004

Replies: 3

Graduate How can before and after lose meaning in quantum foam?

Imparcticle
May 4, 2004 · Replies 3 · May 5, 2004

Replies: 3

Graduate Does relativistic mass increase apply equally to both frames in radioactive decay?

OneEye
May 2, 2004 · Replies 8 · May 4, 2004

Replies: 8

Graduate Penn State lectures on quantum gravity by Abhay Ashtekar

wolram
Apr 29, 2004 · Replies 29 · May 3, 2004

Replies: 29

Graduate Alternative theories to General Relativity - great opportunity

Nereid
Apr 14, 2004 · Replies 19 · May 2, 2004

Replies: 19

Undergrad Can objects exceeding light speed travel in time?

ben_kneale
Apr 30, 2004 · Replies 10 · May 1, 2004

Replies: 10

Undergrad A computer teacher on a physics roll here?

Imparcticle
May 1, 2004 · Replies 1 · May 1, 2004

Replies: 1

Graduate Is the Kerr-Newman Solution the Only Model for Charged Rotating Black Holes?

ZelmersZoetrop
Apr 30, 2004 · Replies 1 · Apr 30, 2004

Replies: 1

Graduate Invariant under Lorentz transformation

Spook
Apr 28, 2004 · Replies 6 · Apr 30, 2004

Replies: 6

Graduate Can You Explain the Basic Equations of General Relativity in 20 Minutes?

LLT
Apr 30, 2004 · Replies 2 · Apr 30, 2004

Replies: 2

Graduate Light Static? 4D Space, Expanding Upwards at c

billy_boy_999
Apr 4, 2004 · Replies 10 · Apr 28, 2004

Replies: 10

Graduate GPB hopefully to end DM nonsense

meemoe_uk
Apr 20, 2004 · Replies 13 · Apr 27, 2004

Replies: 13

Graduate Consistence problems and Introduction to relativity

Feynmanfan
Apr 25, 2004 · Replies 3 · Apr 27, 2004

Replies: 3

Undergrad How Does Mass Distort Spacetime?

jlorino
Apr 22, 2004 · Replies 4 · Apr 27, 2004

Replies: 4

Undergrad Is Mass Truly Just Energy in Different Forms?

JJ
Apr 17, 2004 · Replies 14 · Apr 27, 2004

Replies: 14

Undergrad SR Misunderstanding: Mass from E=mc^2?

Silverious
Apr 26, 2004 · Replies 7 · Apr 27, 2004

Replies: 7

Graduate Do tachyons violate causality by traveling backward in time?

munky99999
Apr 26, 2004 · Replies 5 · Apr 26, 2004

Replies: 5

Graduate Understanding Einstein's Relativity: From Energy Equations to Series Development

OneEye
Apr 26, 2004 · Replies 2 · Apr 26, 2004

Replies: 2

Graduate Is Metric Required for Expansion and Causality in Science?

Mike2
Apr 24, 2004 · Replies 5 · Apr 26, 2004

Replies: 5

Graduate The Pugilistic Albert - Round 2

OneEye
Apr 13, 2004 · Replies 34 · Apr 26, 2004

2

Replies: 34

Graduate String and Relativity questions

JDMatson
Apr 23, 2004 · Replies 18 · Apr 26, 2004

Replies: 18

Graduate Can Reverse Gravitational Force be Used for Interstellar Travel?

IooqXpooI
Apr 21, 2004 · Replies 9 · Apr 25, 2004

Replies: 9

sidebar

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.

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