science
Grade6
Easy
Question
A periscope is used to see the objects which lie ___ of the observer.
- At the eye level
- Below the eye level
- Above the eye level
- All of the above
Hint:
- A periscope is defined as an instrument used for observing over, around or through an obstacle or object which is prevented by direct line of sight.
The correct answer is: Above the eye level
- The periscope makes use of two plane mirrors to see over the top of things.
- If you invert it, It can also helps to see the things below the eye level.
- And also at the eye level.
- So, the correct option is d.
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