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12759
bio website science20.com/…
location Bangalore, India
age
visits member for 4 years, 7 months
seen 9 mins ago

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.


Aug
17
comment Why are gold mirrors yellow?
On the color of metals: physics.stackexchange.com/q/72368
Aug
15
revised Pulling apart two interleaved phone books
added 14 characters in body
Aug
15
comment Lens-Mirror systems and conservation of specific intensity
Related: physics.stackexchange.com/questions/88821/…
Aug
15
reviewed Close Covariant derivative and tensor symmetries
Aug
15
revised Pulling apart two interleaved phone books
added 156 characters in body
Aug
15
answered Pulling apart two interleaved phone books
Aug
4
awarded  Nice Answer
Aug
3
awarded  Necromancer
Aug
1
comment Einstein's principle of equivalence; Standing on earth vs sitting in accelerated car
@bright magus - or rather think of space falling into earth at a speed equal to the local escape velocity.
Aug
1
comment Einstein's principle of equivalence; Standing on earth vs sitting in accelerated car
Related & potential duplicate: physics.stackexchange.com/questions/44170/…
Aug
1
revised Why is the Hubble Space telescope able to see farthest in the universe?
expanded / fixed potential unclarity 'millions of years old' vs 'million of years back'
Aug
1
revised Why is the Hubble Space telescope able to see farthest in the universe?
expanded / fixed potential unclarity 'millions of years old' vs 'million of years back'
Jul
30
comment Why is the Hubble Space telescope able to see farthest in the universe?
@Rick - "pretty recent" I'd say that is when you look at the stars without the help of telescopes: that's observing a 13820 million years old universe...
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?
added 207 characters in body
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.