Just before the Battle of Midway in World War II, the U.S. submarine Trigger ran
ID: 1352358 • Letter: J
Question
Just before the Battle of Midway in World War II, the U.S. submarine Trigger ran aground on a reef. The officers were wearing red goggles, so the bright lights inside the submarine wouldn't interfere with their ability to see in the dark ocean. On their maps, the reefs were marked in red. Why did they run aground? A. Because the whole map would have looked dark B. Because with the red filters on their goggles, the reefs would have looked the same color as the rest of the map, making it hard to identify them C. Because with the red filters on their goggles, the afterimages of the reefs on the maps would have interfered with their view of the ocean floor D. Because the goggles would have blocked their peripheral vision
Explanation / Answer
When white light shines on a red object, all of the colors that form the white light are absorbed except red, which is reflected. This is why the object appears red.
Color filters work the same way, absorbing certain wavelengths of color and transmitting the other wavelengths.
A yellow color filter will let through only yellow and absorb all other colors. So when blue light is allowed through a blue filter onto a blue object, the object will still reflect blue and therefore appear blue. But when blue light from a blue filter hits a red object, the blue will be absorbed and no light will be reflected, giving the object an appearance of being black.
The correct option would then be A Because the whole map would have looked dark
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