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seen Dec 6 at 3:13

Nov
4
awarded  Supporter
Jun
9
comment Moon's pull causes tides on far side of Earth: why?
@Muhammad: You're forgetting that there's a big rightward arrow that all of these should be added to to get the actual gravitational attraction: none of the attraction is in the "opposite direction". The diagram above has simply subtracted off the big rightward arrow so we can more easily see the differences: in particular, how it looks from an earth-centered reference frame.
May
22
comment Why do lasers cut? Is this a case of light acting as matter?
@Keavon: ... thus you are probably thinking of "melting" rather than "burning".
May
1
comment Why does ice melting not change the water level in a container?
@Jodrell: It's the big sheets of ice sitting on Greenland and Antartica that everyone worries about.
Oct
9
comment The inner workings of the Olbers paradox
@Mark: I meant it's plausible, but nonobvious, that the effect of scattering washes out.
Oct
9
comment The inner workings of the Olbers paradox
@Mark: But such objects will still scatter the light. It's plausible, but nonobvious (to me), that this effect washes out.