Which instruments is used for seeing objects at the surface of water?
Question
Which instruments is used for seeing objects at the surface of water from a submarine under water?
Options
Option A
kaleidoscope
Option B
periscope
Option C
spectroscope
Option D
telescope
Correct Option
Option B
Explanation
An apparatus consisting of a tube attached to a set of mirrors or prisms, by which an observer (typically in a submerged submarine or behind a high obstacle) can see things that are otherwise out of sight.
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