Test # 149
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1500 questions in 150 tests. Each test contains 10 questions.
Idiom of the Day
take a toll on (someone or something)
to damage or hurt someone or something by using it too much or by hard living
The stress and long hours at work are beginning to take a toll on my friend.
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Rules to play Underwater Photography
Light in Water
Without getting too technical,it is important to know the three things that happen when light hits water refraction, reflection, and absorption.Refraction is the bending of light rays, reflection sends them back in to the atmosphere, and specific wavelengths colors in the visible spectrum are fully absorbed by incremental depths Red is only visible at shallow depths; blue much deeper.Light intensity and individual colors diminish, which forces the underwater photographer to take action in these low light situations.