12,638 reputation
12656
bio website science20.com/…
location Bangalore, India
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visits member for 4 years, 3 months
seen 15 hours 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.


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?
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Mar
28
answered What causes the specific pattern of sparkly light from a laser pointer
Mar
28
revised Is the lay explanation of the equivalence principle wrong?
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Mar
28
comment Acceleration due to Gravity: Free Fall
Such a bottomless pit is called a black hole.
Mar
28
revised Is the lay explanation of the equivalence principle wrong?
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Mar
28
answered Is the lay explanation of the equivalence principle wrong?
Mar
27
awarded  Good Answer
Mar
27
revised How small does sand have to be to get wet?
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Mar
27
revised How small does sand have to be to get wet?
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Mar
27
comment How small does sand have to be to get wet?
@AdamDavis - have added the requested info (confirming Rahul's estimate). Thanks.
Mar
27
revised How small does sand have to be to get wet?
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Mar
27
revised How small does sand have to be to get wet?
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Mar
26
comment Gravitational force of a ring
@Christian - just vector-sum the gravitational force of two diametrically opposite point masses of mass $\frac12 M$ each.