GK
BASIC GENERAL KNOWLEDGE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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For seeing objects at the surface of water from a submarine under water, the instrument used is
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telescope
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spectroscope
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periscope
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kaleidoscope
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Explanation:
Detailed explanation-1: -Periscope is an instrument used in submarines to observe activity above the water surface while the submarine is submerged. Periscope consists of an outer case with mirrors at each end set parallel to each other at a 45° angle. More complex periscope uses the prisms or advances fiber optics instead of mirrors.
Detailed explanation-2: -Periscope is used in submarines, tanks and also by soldiers in bunkers to see things outside.
Detailed explanation-3: -Periscope is a instrument that uses two mirrors at 45 degree angles to the direction in which one desires to see from a hidden postion. It is used in submarines to search targets and threats on the surface of water and in air.
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