Question

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

Related Questions

Which of the following BEST describes the SeaOrbiter? A. an underwater gazebo that has small pock... Which of the following BEST describes the SeaOrbiter? A. an unmanned ROV that can descend to the... Which of the following BEST describes the SeaOrbiter? A. a partly submerged research vessel place...