Joseph Hirsch's user avatar
Joseph Hirsch's user avatar
Joseph Hirsch's user avatar
Joseph Hirsch
  • Member for 7 years, 4 months
  • Last seen more than a month ago
14 votes
1 answer
4k views

What percentage of the mass/energy of the universe is in the form of electromagnetic waves? [duplicate]

6 votes
3 answers
2k views

Does light with a wavelength on the Planck scale become a self-trapping black hole?

3 votes
1 answer
103 views

Gravitational wavelength shift of microwave background radiation

3 votes
2 answers
137 views

Uncertainty of the past

2 votes
1 answer
55 views

Can the Planck length be altered by relativistic motion? [duplicate]

2 votes
3 answers
9k views

Work done by gravity on falling object does not seem to equal change in mechanical energy

2 votes
1 answer
1k views

Rationale for using percent difference in momentum on AP physics lab

1 vote
0 answers
53 views

Did the distances of the reflecting mirrors in Michelson Morley need to be precise to 100 nm or less?

1 vote
1 answer
107 views

Do wormholes have mass that depends on the spacial separation, the temporal separation, the relative motion of the two ends of the wormhole [duplicate]

1 vote
1 answer
145 views

Could Planck scale wormholes be a solution for non-locality?

1 vote
0 answers
42 views

Can a wormhole change the wavelength of a light beam?

1 vote
0 answers
51 views

Is the indestructibility of information a tautology?

0 votes
1 answer
67 views

Can the mouths of wormholes migrate over time?

0 votes
1 answer
47 views

Red shift/Blue shift as a standard for determining absolute motion

0 votes
1 answer
129 views

Where is the "tube" of a wormhole relative to normal space?

0 votes
0 answers
42 views

Do all observers agree on the sequence of the formation of several black holes?

0 votes
1 answer
988 views

Is Planck length the smallest allowable difference between wavelengths? [duplicate]

0 votes
3 answers
200 views

Relativity of simultaneity in train experiment-doesn't Doppler effect reveal simultaneity?

0 votes
1 answer
99 views

Greatest relativistc mass possible for a single photon [closed]

0 votes
0 answers
40 views

Can a region of space-time be viewed as a particle with properties of it's own? [duplicate]

0 votes
2 answers
98 views

Einstein's train experiment-Do waves from lightning flashes meet after the same number of cycles for all observers? [closed]

0 votes
3 answers
121 views

What does it mean to day that the Webb telescope can see objects 13.6 billion light years away?