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bio website science20.com/…
location Bangalore, India
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visits member for 3 years, 9 months
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Theoretical physicist by training, PhD in spin-polarized quantum systems. Inventor of the DPD micro-hydrodynamics simulation methodology, and specialized in computational physics. Currently chief scientist for a large multinational company. Blogger at Science2.0.


1d
comment Pattern on mesh office chair emulates thin film interference for curved surface. Possible to form an equation?
en.wikipedia.org/wiki/Moir%C3%A9_pattern
Oct
15
comment Does a moving object really shrink due to length contraction?
Bell's spaceship problem is relevant here: en.wikipedia.org/wiki/Bell's_spaceship_paradox
Oct
14
revised What's wrong with my derivation for the spring constant?
added 51 characters in body
Oct
14
revised What's wrong with my derivation for the spring constant?
added 51 characters in body
Oct
14
comment What's wrong with my derivation for the spring constant?
I have assumed the spring to be massless. If no energy is dissipated, the stone will keep oscillating.
Oct
14
revised What's wrong with my derivation for the spring constant?
added 51 characters in body
Oct
14
answered What's wrong with my derivation for the spring constant?
Oct
14
comment What's wrong with my derivation for the spring constant?
Imagine the exact scenario: you place the stone on the spring, the stone moves down and the spring gets compressed, and the stone ends up oscillating around the equilibrium point. This motion stops only after the kinetic energy gets dissipated into heath...
Oct
14
revised What's wrong with my derivation for the spring constant?
Title + tag
Oct
11
comment Are there any ways to alter frequency of wave?
Frequency doubling ( en.wikipedia.org/wiki/Second-harmonic_generation ) is a widely applied technique in nonlinear optics.
Oct
11
comment Center of mass & Big Bang Theory
I find it difficult to believe physics textbooks anywhere in the world do contain the nonsense you are quoting. I hope you are not going to convince us such is the case in India?
Oct
11
comment Physics behind the “Switch Pitch”?
Nice question. Would be absolutely great if the concept of geometric (Berry) phase would play a role!
Oct
11
answered What does the $c$ in $eV/c^2$ stand for?
Oct
11
comment GR exercise: falling particles on earth's surface
Don't have access to Shapiro's book, but would assume he wants the reader at that point to derive a tidal acceleration expression based on the Newtonian approximation?
Oct
11
comment Newtonian gravity vs. general relativity: exactly how wrong is Newton?
@JohnRennie - the 43 arc-seconds is an angular measure related to Mercury's orbit around the sun, not an angular measure related to the position where we observe Mercury's position in the night sky. So your statements about human observers and their eye resolution is misleading because it suggests the latter is the case. In other words: the eye resolution comparison only make sense if you are talking about a hypothetical human observer located at the sun.
Oct
7
comment Is the uncertainity principle a practical reality, a theoretical law or a measurement problem?
The uncertainty principle tells us that the classical approximation to quantum reality yields a model too rich in nature.
Oct
3
awarded  Good Answer
Sep
30
awarded  Explainer
Sep
29
comment Why $r^2$ and not other power of $r$ in mutual force of gravitation?
@Ruslan - but all forces mediated by massless bosons are.
Sep
28
comment Is relativistic event horizon half of Newtonian event horizon?
Please ignore the typo in above (expansion is in powers of $(\phi/c^2)$, not in powers of $(\phi/c)^2$.