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posted by rhettallain vote down flag
blog.dotphys.net - 26 days ago
Comment on Parallax, what is it good for? by Cleon Teunissen
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Did other greeks actually make fun of Aristarchus? Or is that detail a fancy, to make the story juicier? I know, drama is appealing: the one voice who turned out to be right after all. But we don’t know what Aristarchus’ considerations were. It seems to me the prevailing ...
blog.dotphys.net - 27 days ago
Parallax, what is it good for?
— blog.dotphys.net — Very simply, parallax is an apparent motion of an object due to a change in observation position.... Let me start with an example. Here are two photos. I took a picture of the cabinet in the background from two slightly different positions. In the foreground is a clone trooper that did not ... (more) Parallax, what is it good for?

Comments vote down rhettallain rhettallain posted 27 days agoposted this
blog.dotphys.net - 27 days ago
Comment on Parallax, what is it good for? by Tweets that mention What is parallax and what is it ...
— blog.dotphys.net — [...] This post was mentioned on Twitter by Dan Meyer and Rhett Allain, Ashley Allain. Ashley Allain... said: RT @rjallain: blogpost – What is parallax? http://bit.ly/1g5mIu [...] (more) Comment on Parallax, what is it good for? by Tweets that ...

Comments vote down rhettallain rhettallain posted 27 days agoposted this
blog.dotphys.net - 25 days ago
Comment on Parallax, what is it good for? by Cleon Teunissen
— blog.dotphys.net — About the views of the ancient greeks and later. To my knowledge: among greek scholars it was... generally understood that the Earth had to be spherical. For instance, it was known that when there is a lunar eclipse the shadow that the Earth casts on the Moon is always circular. There were ... (more) Comment on Parallax, what is it good for? by Cleon Teunissen

Comments vote down rhettallain rhettallain posted 25 days agoposted this
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Comment on Parallax, what is it good for? by Rhett
blog.dotphys.net 26 days ago — @Cleon, I made up the part about making fun of him. You know, like Rudolph the Red Nose Reindeer…. You make a good point though.
Comment on Parallax, what is it good for? by Tom
blog.dotphys.net 26 days ago — I couldn’t resist turning your clone trooper photos into a stereogram http://blogs.scienceforums.net/swansont/archives/4062
Wait! That’s Not All!
blogs.scienceforums.net 26 days ago — Rhett's got a post up on parallax, and how you can use this effect to measure distance: Parallax, what is it good for? He's got some pictures showing the effect of viewing from different vantage points. The other thing you can do with such photos is ...