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Subject: Re: You use different lenses underwater because the speed of light is different




"Scott W" wrote in message
news:1145849501.835760.62110@u72g2000cwu.googlegroups.com...
>
> Dave Hillstrom wrote:
> > You can't use regular lenses underwater, that's why you always see
> > special cameras on ocean documentaries and such. People think it's
> > because they need to be waterproof but the real reason is the speed of
> > light underwater is different than in air and it makes the light bend
> > at different angles through the lenses.
> > Einstein proved it.
>
> So your thinking is that before Einstein people did not know about
> this?

I'd like to see what happens when he takes his non-waterproof camera with
the special underwater lens on a dive,
Should get some nice pics.
:-)

>
> Scott
>

Dennis



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