Reputation
693
Top tag
Next privilege 1,000 Rep.
Create new tags
Badges
1 6 19
Impact
~27k people reached

Apr
18
comment If a rotating ball gets disintegrated to dust or energy what happens to its angular momentum?
@CuriousOne I could reword it to say "converted to energy" if that makes it correct. What is the mechanism through which electromagnetic radiation carries angular momentum?
Mar
23
comment Are water waves (i.e. on the surface of the ocean) longitudinal or transverse?
We could consider the dots as "leaves" places throughout the medium. In that case I'd say its fairly accurate.
Feb
21
comment What makes us think we can actually detect gravitational waves?
The "sticky beads" argument (en.m.wikipedia.org/wiki/Sticky_bead_argument) claims that gravitational waves do impart energy in the form of heat to objects it passes through.
Feb
11
comment Can space have angular momentum that can be transfered to/from physical objects?
Any comments on the rotating mass question?
Nov
24
comment Is the observable region of the universe within the event horizon of a super-massive black hole?
I'm not able to see how the answer rules out the possibility that we are inside the event horizon of a blackhole that is extremely massive (with event horizon close to a trillion trillion light years, ignoring for the moment the number of Fermions needed for that). Wouldn't space be almost flat and the curvature measurements will be in line with what we observe?
Oct
4
comment How can Ohm's law be correct if superconductors have 0 resistivity?
So how many such "laws" are only approximations? Is gravitational law also like that?
Sep
7
comment How can a singularity in a black hole rotate if it's just a point?
Why a ring and not a disc? Even a disc can have angular momentum and the velocity of a rotating disc need not be as high as that of a rotating ring to keep the same angular momentum. In this regard, a disc is more optimal than a ring. (assuming optimal implies lowest angular velocity).
May
16
comment What exactly is Electromagnetic Radiation?
I meant a great circle on the sphere where the wave's intensity is maximum
May
16
comment What exactly is Electromagnetic Radiation?
One thing I don't understand is that the waves should really die out as the move out in a phere at inverse square rate. I am assuming you meant that at a large distance the "surface of the wave" appears flat. This is analogous to a 2D wave from a pebble dropped in a pond. Does a single wave generated due to one oscillation have a preferred plane of propagation in the surrounding sphere or is it uniform in all directions?
May
15
comment Do quarks really exist?
What is "something else that could be like a quark"? If it quacks like a duck and walks like a duck then it is a duck.
May
15
comment Does black hole formation contradict the Pauli exclusion principle?
Does it mean that Pauli's principle does not prohibit particles occupying the same state, but rather it says that there will be a resistance when this is forced upon the particles (a kind of repulsion/pressure).
Aug
11
comment Do all black holes have a singularity?
@Jerry Schirmer. My error.. I meant "the event-horizon for a blackhole of equivlent mass", not the event horizon itself.
Jun
27
comment on what fundamental force is a black hole based on?
I think gravity is the inward force but what is the outward force that keeps it from collapsing to a singularity? (some theories say that the singularity does not exist)
May
5
comment Would we feel the rotation of a rotating habitat?
I should add that he only have his senses to rely on.
Apr
5
comment Can a neutron star compress until it's converted to a black hole?
is it a coincidence that degeneracy pressure of neutron stars is enough to keep it outside the Schwarzschild radius?
Apr
2
comment Can we prove that the universe is finite or infinite?
not necessarily. the universe could be a fractal. en.m.wikipedia.org/wiki/Olbers'_paradox
Mar
19
comment Given that matter cannot escape a black hole, how did the big bang produce the universe we see today?
wouldn't energy also attract itself due to gravity even if there was no matter in the beginning?
Jan
13
comment Is there a way to create an artificial solar eclipse?
"it would take an object the size of the moon to totally block out its light" is not entirely true. At the distance of the moon, it would indeed take an object the moons size. At half the distance, it would take half the size object (in diameter). If the blocking object is extremely close to the earth's surface, It would need to be much smaller. A large dense cloud can often block the sun completely. However atmosphere scattering would probably not make it completely dark.
Nov
16
comment Is the CMB rest frame special? Where does it come from?
Actually, the answer is to "where the photons come from", and not "where does the rest frame come from"?
Oct
11
comment What makes us think we can actually detect gravitational waves?
I think the trampoline argument may not be 100% accurate. In that, we are travelling on the wave, while in the question, the wave goes through the car as well. In the trampoline example, the car itself would be distorted as per the distortion of the trampoline.