For seeing objects at the surface of water from a submarine under water, the instrument used is ________?
Correct answer: A. Periscope
- A. Periscope
- B. Telescope
- C. Kaleidoscope
- D. Spectroscope
Explanation
A periscope uses mirrors or prisms to let someone view objects above the water while remaining submerged. Telescopes magnify distant objects, whereas kaleidoscopes and spectroscopes serve different purposes.
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