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Posted by on Friday, February 29, 2008 at 4:15pm.

Why does the blood of deep sea divers look greenish-black in underwater photographs taken with natural light, but red when flashbulbs are used?

  • Physics - , Friday, February 29, 2008 at 5:05pm

    What is seeing red? Does that mean red light is being emitted, or being reflected? Is there natural red light underwater, or has it been absorbed?

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