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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.

Prefix: Undergrad

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Undergrad What keeps the planets in orbit

May 22, 2013 · Replies 2 · May 22, 2013

Replies: 2

Views: 2K

Undergrad Seeking clarification on red-shift

May 18, 2013 · Replies 1 · May 18, 2013

Replies: 1

Views: 2K

Undergrad Why things like relativity and evolution aren't called laws?

May 17, 2013 · Replies 3 · May 17, 2013

Replies: 3

Views: 2K

Undergrad Does the law of universal gravity exist?

May 14, 2013 · Replies 16 · May 16, 2013

Replies: 16

Views: 3K

Undergrad Confused on how to calculate invariant interval.

May 13, 2013 · Replies 17 · May 14, 2013

Replies: 17

Views: 5K

Undergrad Why measuring one-way trip impossible?

May 11, 2013 · Replies 43 · May 14, 2013

2

Replies: 43

Views: 5K

Undergrad Is this an acceptable way to describe gravity

May 6, 2013 · Replies 10 · May 6, 2013

Replies: 10

Views: 2K

Undergrad Why People in Orbit Appear Weightless: An Elevator Analogy

May 1, 2013 · Replies 15 · May 4, 2013

Replies: 15

Views: 4K

Undergrad Is this simple derivation of length contraction and time dilation corr

Apr 29, 2013 · Replies 24 · Apr 30, 2013

Replies: 24

Views: 4K

Undergrad Is the Einstein equation E=Mc^2 correct?

Apr 29, 2013 · Replies 7 · Apr 29, 2013

Replies: 7

Views: 3K

Undergrad Why speed of light is measured same regardless of their speed?

Apr 20, 2013 · Replies 96 · Apr 27, 2013

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Replies: 96

Views: 15K

Undergrad Relativity and the speed of time

Apr 24, 2013 · Replies 25 · Apr 26, 2013

Replies: 25

Views: 3K

Undergrad Distance change due to gravity

Apr 22, 2013 · Replies 24 · Apr 24, 2013

Replies: 24

Views: 4K

Undergrad The atomic clock on a jetliner experiment

Apr 22, 2013 · Replies 4 · Apr 24, 2013

Replies: 4

Views: 2K

Undergrad What is Einsteins Paradigm Shift?

Apr 12, 2013 · Replies 21 · Apr 23, 2013

Replies: 21

Views: 10K

Undergrad Speed of Light: Constant or Not?

Apr 21, 2013 · Replies 2 · Apr 21, 2013

Replies: 2

Views: 1K

Undergrad Does SR and GR agree on Newton's Third Law of Motion ?

Apr 20, 2013 · Replies 11 · Apr 20, 2013

Replies: 11

Views: 3K

Undergrad Speed of light and dark matter

Apr 5, 2013 · Replies 70 · Apr 20, 2013

3

Replies: 70

Views: 9K

Undergrad Einstein's contribution post 1915

Apr 12, 2013 · Replies 9 · Apr 12, 2013

Replies: 9

Views: 2K

Undergrad Light waves propagate with no medium

Apr 12, 2013 · Replies 3 · Apr 12, 2013

Replies: 3

Views: 2K

Undergrad Why Does Light Take 8 Minutes to Reach Earth from the Sun

Apr 9, 2013 · Replies 4 · Apr 10, 2013

Replies: 4

Views: 2K

Undergrad A phone call at the speed of light?

Apr 9, 2013 · Replies 8 · Apr 9, 2013

Replies: 8

Views: 6K

Undergrad Black Holes Uniting: How Do They Crash?

Apr 9, 2013 · Replies 5 · Apr 9, 2013

Replies: 5

Views: 2K

Undergrad How does timedilation apply to things other than lightclocks?

Apr 7, 2013 · Replies 12 · Apr 9, 2013

Replies: 12

Views: 2K

Undergrad Question about relative motion: 3 Golden Retrievers in deep space

Apr 8, 2013 · Replies 12 · Apr 8, 2013

Replies: 12

Views: 2K

Undergrad Explaining the Physics Behind Light Speed: F=ma

Apr 7, 2013 · Replies 2 · Apr 8, 2013

Replies: 2

Views: 2K

Undergrad Are descriptions of relative velocity arbitrary?

Apr 4, 2013 · Replies 10 · Apr 5, 2013

Replies: 10

Views: 2K

Undergrad Examples for gravitational time dilation

Apr 3, 2013 · Replies 14 · Apr 3, 2013

Replies: 14

Views: 8K

Undergrad Explaining the equation of gravitational time dilation

Apr 3, 2013 · Replies 3 · Apr 3, 2013

Replies: 3

Views: 2K

Undergrad Gravitational Time Dilation: Equation & Calculation

Apr 3, 2013 · Replies 2 · Apr 3, 2013

Replies: 2

Views: 2K

Undergrad Gravitational Time Dilation: Equation & Calculation

Apr 3, 2013 · Replies 1 · Apr 3, 2013

Replies: 1

Views: 1K

Undergrad Special and general relativity

Apr 3, 2013 · Replies 7 · Apr 3, 2013

Replies: 7

Views: 2K

Undergrad Derivation of lorentz transformation

Apr 3, 2013 · Replies 3 · Apr 3, 2013

Replies: 3

Views: 2K

Undergrad Acceleration vs. uniform motion: There are three rockets in deep space

Apr 1, 2013 · Replies 11 · Apr 1, 2013

Replies: 11

Views: 3K

Undergrad Is There a Connection Between Time and Size in Physics?

Apr 1, 2013 · Replies 4 · Apr 1, 2013

Replies: 4

Views: 1K

Undergrad Time, Space & Light: Einstein's Theory Explained

Mar 31, 2013 · Replies 2 · Mar 31, 2013

Replies: 2

Views: 1K

Undergrad Struggling to understand why uniform motion is so different from non-u

Mar 28, 2013 · Replies 19 · Mar 29, 2013

Replies: 19

Views: 3K

Undergrad Event Horizons and Star's mass relationship

Mar 29, 2013 · Replies 1 · Mar 29, 2013

Replies: 1

Views: 1K

Undergrad Are acceleration and deceleration the only ways we feel motion?

Mar 26, 2013 · Replies 20 · Mar 28, 2013

Replies: 20

Views: 4K

Undergrad Why matter can't reach the speed of light ?

Mar 21, 2013 · Replies 40 · Mar 26, 2013

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Replies: 40

Views: 7K

Undergrad Can continuous acceleration reach speed of light?

Nov 20, 2011 · Replies 14 · Mar 25, 2013

Replies: 14

Views: 5K

Undergrad Understanding Special Relativity (beginner questions)

Mar 23, 2013 · Replies 5 · Mar 24, 2013

Replies: 5

Views: 2K

Undergrad Time dilation and lorentz transformation

Mar 21, 2013 · Replies 11 · Mar 23, 2013

Replies: 11

Views: 3K

Undergrad What is the difference between separation in space and separation in time?

Mar 16, 2013 · Replies 15 · Mar 21, 2013

Replies: 15

Views: 3K

Undergrad How Strong is the Gravity of a Black Hole Compared to Earth?

Mar 19, 2013 · Replies 1 · Mar 19, 2013

Replies: 1

Views: 2K

Undergrad Acceleration in a Closed Box: Uniform or Varied?

Mar 9, 2013 · Replies 34 · Mar 14, 2013

2

Replies: 34

Views: 6K

Undergrad Are we moving at the speed of light?

Mar 11, 2013 · Replies 29 · Mar 13, 2013

Replies: 29

Views: 11K

Undergrad Question for Special Relativity

Mar 13, 2013 · Replies 2 · Mar 13, 2013

Replies: 2

Views: 1K

Undergrad Point of reference in relative time

Mar 12, 2013 · Replies 7 · Mar 12, 2013

Replies: 7

Views: 2K

Undergrad Is the speed of light the same for all observers?

Feb 14, 2013 · Replies 14 · Mar 12, 2013

Replies: 14

Views: 3K

Undergrad Understanding Time in Space-Time for Beginners

Mar 8, 2013 · Replies 10 · Mar 12, 2013

Replies: 10

Views: 3K

Undergrad C = √ (E/m) We can determine c

Mar 11, 2013 · Replies 3 · Mar 11, 2013

Replies: 3

Views: 3K

Undergrad Do physics professors still misunderstand Einstein?

Mar 11, 2013 · Replies 30 · Mar 11, 2013

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Replies: 30

Views: 4K

Undergrad Relativity: Observer's Perspective - Am I Getting it Right?

Mar 7, 2013 · Replies 2 · Mar 7, 2013

Replies: 2

Views: 1K

Undergrad Can you explain how time is not constant?

Feb 24, 2013 · Replies 26 · Mar 6, 2013

Replies: 26

Views: 19K

Undergrad Why is the theory of relativity a theory?

Mar 4, 2013 · Replies 21 · Mar 4, 2013

Replies: 21

Views: 3K

Undergrad Can Matter Waves Travel Faster Than Light?

Feb 18, 2013 · Replies 3 · Feb 22, 2013

Replies: 3

Views: 2K

Undergrad Animated Gravity : Einstein vs. Newton

Feb 3, 2013 · Replies 13 · Feb 15, 2013

Replies: 13

Views: 4K

Undergrad Is E=mc2 About Converting Mass to Energy?

Feb 13, 2013 · Replies 14 · Feb 14, 2013

Replies: 14

Views: 6K

Undergrad Frames of reference for speed?

Feb 8, 2013 · Replies 25 · Feb 13, 2013

Replies: 25

Views: 4K

Undergrad Can kinetic energy be added linearly?

Feb 10, 2013 · Replies 1 · Feb 10, 2013

Replies: 1

Views: 1K

Undergrad Time Dilation: Can You Chase Something Too Fast?

Feb 9, 2013 · Replies 1 · Feb 9, 2013

Replies: 1

Views: 2K

Undergrad Question about gravity on a moving object

Jan 28, 2013 · Replies 5 · Jan 28, 2013

Replies: 5

Views: 2K

Undergrad Find Dist. b/w 2 Points in 3D Space incl. Time Dim.

Jan 24, 2013 · Replies 6 · Jan 25, 2013

Replies: 6

Views: 2K

Undergrad Proper time: confusion over what it means

Jan 24, 2013 · Replies 7 · Jan 24, 2013

Replies: 7

Views: 2K

Undergrad Time Traveling: Can We Go Back in Time?

Jan 24, 2013 · Replies 1 · Jan 24, 2013

Replies: 1

Views: 2K

Undergrad Earth Travel Speed: 800 km/s in Universe?

Jan 17, 2013 · Replies 17 · Jan 23, 2013

Replies: 17

Views: 5K

Undergrad Please explain this light speed question.

Jan 18, 2013 · Replies 8 · Jan 21, 2013

Replies: 8

Views: 2K

Undergrad How Does General Relativity Explain Gravitational Movement?

Jan 17, 2013 · Replies 11 · Jan 18, 2013

Replies: 11

Views: 3K

Undergrad Software for General Relativity

Jan 13, 2013 · Replies 6 · Jan 15, 2013

Replies: 6

Views: 4K

Undergrad Can Earth be considered an inertial reference frame?

Jan 14, 2013 · Replies 8 · Jan 15, 2013

Replies: 8

Views: 3K

Undergrad Gravitational Dilation of Time

Jan 14, 2013 · Replies 5 · Jan 15, 2013

Replies: 5

Views: 2K

Undergrad What Inspired Einstein to Develop the Concept of Spacetime?

Jan 10, 2013 · Replies 1 · Jan 10, 2013

Replies: 1

Views: 2K

Undergrad Travelling faster than speed of light

Jan 8, 2013 · Replies 2 · Jan 8, 2013

Replies: 2

Views: 2K

Undergrad Difference between the special and general relativity

Jan 4, 2013 · Replies 14 · Jan 8, 2013

Replies: 14

Views: 5K

Undergrad What's the difference between Lorentz factor for frames and for particles?

Jan 8, 2013 · Replies 1 · Jan 8, 2013

Replies: 1

Views: 2K

Undergrad When moving at the speed of light time stops

Dec 29, 2012 · Replies 85 · Jan 6, 2013

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Replies: 85

Views: 14K

Undergrad Why is Time DILATION Called Time DILATION?

Dec 29, 2012 · Replies 40 · Jan 6, 2013

2

Replies: 40

Views: 8K

Undergrad Gravitational Potential & Field: Doubts & Solutions

Dec 27, 2012 · Replies 63 · Jan 3, 2013

3

Replies: 63

Views: 10K

Undergrad Does My Wrist Watch Physically Beat Slower?

Dec 23, 2012 · Replies 96 · Dec 31, 2012

4

Replies: 96

Views: 17K

Undergrad Do Charged Particles Exhibit Stronger Gravitational Fields?

Oct 27, 2012 · Replies 36 · Dec 28, 2012

2

Replies: 36

Views: 5K

Undergrad Why Does Space Contract When Approaching the Speed of Light?

Dec 26, 2012 · Replies 17 · Dec 27, 2012

Replies: 17

Views: 9K

Undergrad Hafele and Keating time dilation question

Dec 22, 2012 · Replies 29 · Dec 25, 2012

Replies: 29

Views: 6K

Undergrad Gravity and ideas of how we can effect it on earth

Dec 23, 2012 · Replies 3 · Dec 23, 2012

Replies: 3

Views: 2K

Undergrad Is Mass a Form of Energy According to E = mc²?

Dec 21, 2012 · Replies 4 · Dec 21, 2012

Replies: 4

Views: 2K

Undergrad Time of acceleration dissipation

Jun 28, 2012 · Replies 21 · Dec 18, 2012

Replies: 21

Views: 4K

Undergrad Doubt in the calculation of the age of the universe?

Dec 17, 2012 · Replies 11 · Dec 18, 2012

Replies: 11

Views: 2K

Undergrad How to explain Einstein's Special theory of Relativity.

Oct 28, 2012 · Replies 135 · Dec 16, 2012

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Replies: 135

Views: 21K

Undergrad Can a nuclear bomb detonated from orbit actually destroy the Earth?

Dec 16, 2012 · Replies 12 · Dec 16, 2012

Replies: 12

Views: 3K

Undergrad What happens during acceleration in twin paradox?

Dec 8, 2012 · Replies 11 · Dec 10, 2012

Replies: 11

Views: 4K

Undergrad Mass causes space time curvature

Dec 1, 2012 · Replies 24 · Dec 6, 2012

Replies: 24

Views: 5K

Undergrad Understanding Light Clock & Time Dilation

Mar 21, 2011 · Replies 8 · Dec 2, 2012

Replies: 8

Views: 6K

Undergrad Is the speed of light affected by relative motion?

Nov 27, 2012 · Replies 4 · Nov 27, 2012

Replies: 4

Views: 2K

Undergrad Perpetual Acceleration: Questions for Beginners

Nov 19, 2012 · Replies 7 · Nov 21, 2012

Replies: 7

Views: 3K

Undergrad The Full Equation for Mass-energy Equivalence

Nov 18, 2012 · Replies 3 · Nov 18, 2012

Replies: 3

Views: 14K

Undergrad Is Energy Conserved When an Object Approaches Light Speed?

Nov 7, 2012 · Replies 3 · Nov 12, 2012

Replies: 3

Views: 3K

Undergrad Understanding E=mc² and Other Equations of Relativity

Nov 6, 2012 · Replies 19 · Nov 7, 2012

Replies: 19

Views: 5K

Undergrad How was the Lorentz factor derived?

Nov 4, 2012 · Replies 2 · Nov 4, 2012

Replies: 2

Views: 4K

Undergrad The argument of the change of units

Nov 2, 2012 · Replies 26 · Nov 4, 2012

Replies: 26

Views: 4K

Undergrad Why is the Speed of Light 186282mps?

Nov 1, 2012 · Replies 12 · Nov 2, 2012

Replies: 12

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.

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