Question

where is periscope used​

Answer 1

Answer:

Periscope, optical instrument used in land and sea warfare, submarine navigation, and elsewhere to enable an observer to see his surroundings while remaining under cover, behind armour, or submerged.

Answer 2

1. It is used to detect submarines.

2. It is used to see the objects on the other side of a high object which can't be seen directly.

3. It is also used in watch tower to look after enemies .

4. It is used by soliders in trench warfare.

5 . It is used to see above the head of crowds.