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



Dave Hillstrom wrote:
> 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.

Complete rubbish. It is because of the different speeds at which the
*lens* travels to the ground under and above water.

> Einstein proved it.

Einstein was a Usenet kook.

Cheers
Steffen.


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