science
Grade6
Easy
Question
Periscopes can be used ____.
- To see over the top of a crowd
- In the submarines
- To see over a wall
- All of the above
Hint:
Periscope is used to see the things lying above the eye level, below it and at the eye level preventing direct line of sight.
The correct answer is: All of the above
- Periscopes can be used to see above a wall.
- To see the top of the crowd.
- And also used in submarines.
- So, the correct option is d.
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