Tag: optics

Event cloaking

[podcast]https://edwardwillett.com/wp-content/upLoads//2011/07/Event-Cloaking.mp3[/podcast] It’s just possible you haven’t heard yet that the final Harry Potter movie, Harry Potter and the Deathly Hallows Part 2, has just been released…although if that’s the case you’re probably also living on another planet and aren’t reading this at all. Harry Potter, boy wizard, makes very good use, over the course of …

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Saskatchewan has elected to call itself “Land of Living Skies.”  One good reason appeared in the sky on Canada Day following an afternoon thunderstorm:  a rainbow. In space, the sky is black and the sun appears white, and that’s all there is to it. But before the light of the sun reaches us down here …

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  When it’s -25 and the wind’s blowing, we tend to keep our faces turned firmly to the ground, with occasional glances up to make sure we’re not about to walk into traffic. But if, during the recent cold spell, you were brave (or foolish) enough to raise your head, you may have been treated …

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