To view objects at the surface of water from a submarine under water, the instrument used is:
a) kaleidoscope
c) spectroscope
b) periscope
d) telescope
The Correct answer is b) periscope
To view objects at the surface of water from a submarine under water, the instrument used is:
a) kaleidoscope
c) spectroscope
b) periscope
d) telescope
The Correct answer is b) periscope