User Alchimista - Physics Stack Exchange

20 votes

3 answers

3k views

Is it possible to confine a photon in less than its* wavelength?

asked Feb 3, 2021 at 12:16

7 votes

2 answers

2k views

Can we give a sense or put in context the fact that gravity isn't a force yet is one of the fundamental ones? [duplicate]

asked May 9, 2021 at 11:15

3 votes

1 answer

84 views

How does a balloon expanding at relativistic speed look like?

asked Dec 13, 2021 at 10:12

3 votes

2 answers

283 views

Why CBR and Comoving coordinates are not absolute reference frames?

asked Dec 4, 2017 at 20:34

3 votes

1 answer

52 views

What is the explanation for this light during a rainbow?

asked Feb 2, 2021 at 18:11

2 votes

0 answers

863 views

What was the size of universe at big bang [duplicate]

asked Nov 4, 2017 at 10:55

2 votes

2 answers

164 views

Is there a model relating GW signal and luminosity of the merger / burst?

asked Oct 19, 2017 at 13:32

2 votes

2 answers

169 views

On dark matter distribution and effects at terrestrial (or solar system) scale [duplicate]

asked Dec 28, 2017 at 20:35

1 vote

1 answer

43 views

Expansion of universe. Acceleration and observations at different times and distances

asked Dec 13, 2017 at 10:33

0 votes

1 answer

59 views

Can we observe something on just the horizon of a black hole? [duplicate]

asked Dec 22, 2017 at 10:26

0 votes

1 answer

129 views

Could universe expansion continue after the universe reached thermodynamic equilibrium

asked Feb 15, 2019 at 15:19

0 votes

1 answer

115 views

On universe homogeneity. Why "shouldn't be" so? [closed]

asked May 31, 2019 at 14:04

0 votes

0 answers

50 views

Big crunch scenario, would black holes form?

asked Jul 31, 2019 at 9:49

0 votes

0 answers

49 views

Space expansion per se, "fine". But can we rule out a bigger empty universe in which our cosmology takes place?

asked Oct 28, 2019 at 14:24

0 votes

1 answer

146 views

Neutrinos detection. What mechanism for their interaction with matter?

asked Nov 17, 2020 at 10:37

0 votes

0 answers

92 views

Why there is needing for inflation?

asked Nov 3, 2017 at 14:47

0 votes

1 answer

80 views

What happens to a terrestrial body bound to a far away galaxy?

asked Jul 31, 2017 at 23:45

0 votes

1 answer

175 views

Sudden doubt about the principle behind Gravitational waves detection

asked Oct 4, 2017 at 13:14

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18 Questions

Is it possible to confine a photon in less than its* wavelength?

Can we give a sense or put in context the fact that gravity isn't a force yet is one of the fundamental ones? [duplicate]

How does a balloon expanding at relativistic speed look like?

Why CBR and Comoving coordinates are not absolute reference frames?

What is the explanation for this light during a rainbow?

What was the size of universe at big bang [duplicate]

Is there a model relating GW signal and luminosity of the merger / burst?

On dark matter distribution and effects at terrestrial (or solar system) scale [duplicate]

Expansion of universe. Acceleration and observations at different times and distances

Can we observe something on just the horizon of a black hole? [duplicate]

Could universe expansion continue after the universe reached thermodynamic equilibrium

On universe homogeneity. Why "shouldn't be" so? [closed]

Big crunch scenario, would black holes form?

Space expansion per se, "fine". But can we rule out a bigger empty universe in which our cosmology takes place?

Neutrinos detection. What mechanism for their interaction with matter?

Why there is needing for inflation?

What happens to a terrestrial body bound to a far away galaxy?

Sudden doubt about the principle behind Gravitational waves detection