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Refractive index is defined as n = c/v where c is the speed of light in the vacuum and v is the velocity of the light in a given material. Therefore refractive index outside of vacuum can be any number that is greater than one.

a) True b) False

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Hello Johny and welcome to Physics Stack Exchange. Here, we neither answer one word questions nor do any homework. Sorry... But, If you've got any problem regarding something you can't understand, we're here to help. Probably, this question would be closed as too localized.. One thing - These one word answers are elaborated already in Wiki – Crazy Buddy Sep 19 '12 at 4:34
Sorry, I don't typically do this as I'm a software guy. I tried finding the answer on my own but this was my last resort. – Johny Kilkocx Sep 19 '12 at 5:27
Hi Johny, Just a simple advice: Try exploring out in wiki or just Google it out before asking in Stack exchange sites..! – Crazy Buddy Sep 19 '12 at 5:40

closed as too localized by David Zaslavsky♦ Sep 19 '12 at 6:01

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, see the FAQ.

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