In problem involving days, a 365-day year is assumed.
Marine biology. Refer to Problem 1. Light intensity I relative to depth d (in feet) for one of the clearest bodies of water in the world, the Sargasso Sea, can be approximated by
I = I0e−0.00942d
where I0 is the intensity of light at the surface. What percentage of the surface light will reach a depth of
(A) 50 feet?
(B) 100 feet?
Problem 1
In problem involving days, a 365-day year is assumed.
Marine biology. Marine life depends on the microscopic plant life that exists in the photic zone, a zone that goes to a depth where only 1% of surface light remains. In some waters with a great deal of sediment, the photic zone may go down only 15 to 20 feet. In some murky harbors, the intensity of light d feet below the surface is given approximately by
I = I0e−0.23d
What percentage of the surface light will reach a depth of
(A) 10 feet?
(B) 20 feet?
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