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bio website science20.com/…
location Bangalore, India
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visits member for 4 years, 6 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.


2d
comment Why is not the entropy of earth increasing?
Patches of earth directed away from the sun (locations on earth at night) pump away a lot of entropy in the form of thermal radiation...
Jul
26
answered If time is relative, how could time pass?
Jul
26
revised Measuring the speed of light and defining the metre - absolute or relative?
expanded / comparison to concept 'right angle'
Jun
14
revised Is it possible to build an optical system that increases the perceived surface brightness?
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Jun
14
answered Is it possible to build an optical system that increases the perceived surface brightness?
May
27
comment Does a positive or negative charge attract a neutral object?
One nitpick related to the last line in the answer: Under suitable circumstances (induced polarization attraction stronger than repulsion caused by charges) two objects, even when both charged with charge of the same sign, can attract.
May
26
comment What should the length of my wire be in order to get a surface area of 10cm^2?
The above assumes you want to obtain a coil that has area 1000 mm^2 when viewed from above. (See @gregsan 's remark)
May
26
comment What should the length of my wire be in order to get a surface area of 10cm^2?
When viewed from the side, 820 mm of 1.22 mm diameter wire, will appear as an area of 1000 mm^2 = 10 cm^2. And it doesn't matter all too much how you coil this up, as long as no part of the wire gets hidden, the area stays the same.
May
21
comment How does warped space actually look (visually)?
Have you seen the movie Interstellar? The space distortion due to gravity is represented fairly accurately in this movie: Kip Thorne, who was the Feynman professor of theoretical physics at Caltech, acted as science advisor for the animated visualizations.
May
21
revised How does warped space actually look (visually)?
Tags
May
11
awarded  Popular Question
Apr
22
awarded  special-relativity
Apr
13
awarded  Revival
Apr
12
comment What does a unit like $C^{1/5}$ or $kg^{1/2}$ physically mean?
Whenever you encounter a quantity with rational physical dimensions, there is a corresponding power of that quantity that has a clear physical meaning and that comes with integer physical dimensions.
Mar
29
comment Why do we form cosmological theories based on old data?
I just wonder where the strange thought "all input data into our cosmological models is from galaxies at least 7 billion light years away" comes from?
Mar
28
revised What causes the specific pattern of sparkly light from a laser pointer
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Mar
28
revised What causes the specific pattern of sparkly light from a laser pointer
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Mar
28
answered Acceleration due to Gravity: Free Fall
Mar
28
revised Is the lay explanation of the equivalence principle wrong?
typo
Mar
28
revised Is the lay explanation of the equivalence principle wrong?
added 54 characters in body