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Observers
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Why Sun light can reach us if Time is dilating?
February 6th, 2021
observers
special-relativity
reference-frames
speed-of-light
time
Does time exist without Gravity?
February 21st, 2020
observers
event-horizon
time
spacetime
general-relativity
Why don't two observers' clocks measure the same time between the same events?
August 1st, 2022
time
reference-frames
time-dilation
observers
special-relativity
Time dilation - why the observers see each other the slow one but then one of them is older or younger?
August 1st, 2020
reference-frames
special-relativity
general-relativity
observers
Falling into a black hole
July 29th, 2020
event-horizon
general-relativity
black-holes
observers
What is the wavefunction of the observer himself?
January 16th, 2022
quantum-mechanics
wavefunction
observers
quantum-interpretations
quantum-measurements
How can black hole increase its mass?
August 1st, 2022
observers
event-horizon
mass-energy
black-holes
general-relativity
What is meant by coordinate time? Isn't it time measured on a clock? If not then what does it measure?
March 6th, 2021
time
observers
general-relativity
coordinate-systems
definition
Does coordinate time have physical meaning?
January 31st, 2020
general-relativity
observers
gravitational-redshift
coordinate-systems
time
Why shouldn't the uncertainty principle be interpreted as an observer effect?
June 30th, 2021
quantum-mechanics
heisenberg-uncertainty-principle
observers
Is time sped up when orbiting a black hole? Why? What does that mean?
August 1st, 2022
general-relativity
spacetime
black-holes
reference-frames
observers
Does the particle interfere with itself, or the observer?
July 13th, 2020
double-slit-experiment
measurement-problem
quantum-interpretations
observers
interference
What exactly is the 'observer' in physics and/or quantum mechanics?
January 7th, 2020
quantum-mechanics
double-slit-experiment
measurement-problem
observers
observables
Time dilation at a black hole
May 31st, 2020
black-holes
general-relativity
observers
A small black hole asymptotically approaches a big black hole's event horizon. Will it seem to be frozen there, or will it seem to merge?
August 1st, 2022
black-holes
reference-frames
event-horizon
observers
general-relativity
Do physicists understand why time slows down the faster the velocity of an object?
November 8th, 2020
special-relativity
observers
time-dilation
inertial-frames
spacetime
Is the second postulate of Einstein's special relativity an axiom?
July 5th, 2020
observers
inertial-frames
special-relativity
speed-of-light
Which observer measures proper time in the twins paradox?
November 13th, 2020
observers
special-relativity
reference-frames
coordinate-systems
inertial-frames
Why is time-order invariant in timelike interval?
April 3rd, 2020
observers
inertial-frames
metric-tensor
spacetime
special-relativity
Why doesn't time contract?
February 17th, 2022
observers
inertial-frames
coordinate-systems
spacetime
special-relativity
If you travel on car with nearly the speed of light and turn on the car headlights: will it shine in gamma light instead of visible light?
February 11th, 2022
observers
special-relativity
inertial-frames
speed-of-light
spacetime
What is the reason to believe that the laws of physics are same in all frames of reference?
January 27th, 2020
special-relativity
inertial-frames
observers
covariance
Is Hawking radiation real for a far away observer?
September 22nd, 2020
general-relativity
black-holes
observers
hawking-radiation
qft-in-curved-spacetime
Understanding Time Dilation at the Event Horizon
April 19th, 2020
black-holes
general-relativity
event-horizon
observers
time-dilation
Since the speed of light is constant and also the speed limit; would you, in your reference frame, have no upper bound on your speed?
May 24th, 2021
special-relativity
speed-of-light
inertial-frames
observers
faster-than-light
Does the collapse of the wave function depend on the observer?
August 1st, 2022
quantum-mechanics
quantum-information
observers
wavefunction-collapse
quantum-measurements
Does the future already exist? If so, which one?
February 12th, 2020
determinism
time
reference-frames
relativity
observers
Which clock is the fastest inside an accelerating body?
September 12th, 2020
observers
acceleration
reference-frames
special-relativity
rocket-science
How can time be relative?
December 4th, 2020
reference-frames
time
special-relativity
observers
relativity
Time Dilation - How does it know which Frame of Reference to age slower?
March 21st, 2020
reference-frames
observers
special-relativity
relativity
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