131,888 reputation
8221365
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 3 months
seen 2 hours ago

Semi retired old time computer nerd who started programming on a Commodore Pet.

Since I'm also active in the Physics forum I should add that I started as a theoretical chemist, moved into solid state photochemistry and finally worked in industry as a colloid scientist. I only became a full time computer nerd in 1997.


2d
reviewed No Action Needed special theory of relativity-time dilation
2d
reviewed Leave Open The influence of electric potential of a planet to a spaceship
2d
revised The influence of electric potential of a planet to a spaceship
Typo
2d
reviewed Close How to calculate acceleration of the elevator?
2d
reviewed Close From Eulerian to Lagrangian coordinates (Rigid Body)
2d
reviewed Leave Open How to find the number of distinct contraction cases in Wick's Theorem?
2d
reviewed Close True randomness via Radioactive decay
2d
reviewed Close Electrostatic, electromagnetic, electric, field, force, e.m.f, p.d
2d
comment Has the human race ever done Antimatter experiments in outer space (e.g. on the ISS)?
@RandyWelt: Cost. If we had that sort of money available we'd use it to build the same linear accelerator much more cheaply on Earth.
2d
comment Is Einstein's characterization of “time” as “the position of the little hand of my watch” definitive and binding in the RT?
@Lohoris: better still when someone mis-spells it and writes bare with me :-)
2d
comment Calculating uniform angles between 2 vectors
@JacksonHart: 15 degrees anticlockwise from [100]
2d
reviewed Approve Does time dilation imply that events do not take place?
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reviewed No Action Needed Amplitude of eliptically polarised light
2d
comment What would happen if I mix Salt and Sugar in a cup of water?
Have you tried the experiment? It doesn't require any complicated kit :-)
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comment Calculating uniform angles between 2 vectors
Construct all the other vectors by reflecting in the $x$ and $z$ axes. So reflecting (tan(15) 0 1) in the $z$ axis gives (-tan(15) 0 1) as you say. Reflect the other five vectors on the diagram to complete the top left quadrant. Then reflect all your vectors in the $x$ axis to complete the bottom half.
2d
comment Calculating uniform angles between 2 vectors
No, it would be (tan(30) 0 1) then (tan(15) 0 1) then (tan(0) 0 1), which is of course just (0 0 1). Draw in the vectors on my diagram to convince yourself of this.
2d
answered Calculating uniform angles between 2 vectors
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comment Calculating uniform angles between 2 vectors
Aha I see. You mean take the plane that the two vectors lie in, then construct two more vectors in this plane so that the angles between adjacent vectors is one third of the angle between your original two vectors?
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reviewed No Action Needed Calculating uniform angles between 2 vectors
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comment Calculating uniform angles between 2 vectors
Jackson, I don't really get what you're asking. Why are there two angles involved? Are you trying to work out the differences in the angles of azimuth and altitude? And what does uniformly distributed mean in this context. Forgive me if this is obvious to crystallographers, it was thirty years ago I last studied it.