This weekend was sunny and hot in Bermuda so I was at the beach with a number of friends (for those of you in colder climates :P ). There was a discussion about using sunblock when you plan to go swimming - one of my friends figured the water would absorb the UV light so he didn't need to use sunblock. I told him that my understanding was that water didn't do a good job absorbing UV so he could still get sunburned while swimming (despite other factors such as sunlight reflecting off the water and so forth).
I started Googling information on this today and while I can find information on water absorbing UV light what I really wanted was a table that showed the absortivity of water at various wavelengths. Ten minutes later I haven't found one, there's too many links to sunscreens and water purification products. Can anyone provide a link to a chart?