Tim

309 reputation

bio	website	github.com/tvwerkhoven
	location	Netherlands
	age	28
visits	member for	1 year, 10 months
	seen	Dec 24 '12 at 8:53
stats	profile views	12

I use programming for work and I find StackOverflow a very useful resource for when things go wrong.

	309 reputation	bio	website	github.com/tvwerkhoven	visits	member for	1 year, 10 months
25 badges		location	Netherlands		seen	Dec 24 '12 at 8:53

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Nov 30	awarded	Enlightened
Nov 30	awarded	Nice Answer
Jul 21	awarded	Yearling
Aug 8	comment	How can a laser pointer have range of several kilometers in atmosphere? You're right, I had some things mixed up. But I fail to see why this does not apply to coherent light. Even laser beams diverge (slightly) and thus decay with $1/r^2$.
Aug 8	comment	How can a laser pointer have range of several kilometers in atmosphere? In a vacuum (which space is not), light travels more or less uninterruptedly. But because of non-zero divergence of any beam, the 'brightness' will slowly go to zero.
Aug 8	answered	How can a laser pointer have range of several kilometers in atmosphere?
Aug 8	comment	How can a laser pointer have range of several kilometers in atmosphere? As far as I know that's not correct, only beams that illuminate the whole unit sphere ($4\pi$ steradian) lose 'intensity' with $1/r^2$. The difference is in the divergence of the beams, the more convergent the beams are, the less they lose 'intensity' ('intensity' is a bit tricky here because there are various units that can be used).
Jul 29	revised	Could a human run horizontally inside a Wall of Death? typeset math using $$
Jul 29	suggested	suggested edit on Could a human run horizontally inside a Wall of Death?
Jul 28	comment	Roughly how many atoms thick is the layer of graphite left by a pencil writing on paper? I don't claim this is an accurate answer, the weakest part is very probably the maximum surface a pencil can write. I couldn't find any better estimates that quickly, so I settled for this. This answer is more about the method than the actual answer, with better data you can easily update the estimate.
Jul 26	answered	Roughly how many atoms thick is the layer of graphite left by a pencil writing on paper?
Jul 25	answered	Finding the max height of a ball launched as a projectile using work-energy
Jul 25	comment	number of electrons my laptop uses in a second Also note that the input electricity is AC, so the number of electrons passing through any circuit is time-variable.
Jul 25	answered	Maximal Gravity
Jul 22	comment	Light Energy Absorption In Mirror 1) this lacks necessary detail to solve the question, 2) this sounds somewhat like homework...
Jul 21	awarded	Supporter
Jul 21	answered	Projecting image without manual focussing
Jul 21	awarded	Editor
Jul 21	revised	Is apparent horizon curvature lesser due to refraction of light in the atmosphere? clarification
Jul 21	comment	Is apparent horizon curvature lesser due to refraction of light in the atmosphere? That's a somewhat more concise way of putting it, yes ;)