What percent of opacity means that the exhaust is so dark that it completely blocks light from a beam projected through the exhaust smoke?

Name: What percent of opacity means that the exhaust is so dark that it completely blocks light from a beam projected through the exhaust smoke?
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Question

Quizplus · Accepted Answer

100% opacity means the exhaust is so dark that it completely blocks light from a beam projected through the exhaust smoke, indicating no light can pass through.

What Percent of Opacity Means That the Exhaust Is So