Questions tagged [light]

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Which transparent mineral has the highest IOR? natural or lab made

I do apologize if this is the wrong place to ask this question. It's a rather simple question, but google gave me rather vague / random results, so I thought it might be better to ask somewhere like ...
Mister SirCode's user avatar
3 votes
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How could a 9 hour rainbow be possible?

The BBC article Taiwan rainbow 'lasts record-breaking nine hours' also mentions that Guinness World Records lists six hours as the current record. See also Taiwan News Taiwan shatters world record for ...
uhoh's user avatar
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Identifying circle of light in night sky

I was recently reminded of when, while with some friends 20some years ago, we happened to look up and see a circle of what seemed to be light (in the sky of course). The circle was "empty" (only the ...
deg's user avatar
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