science
Grade6
Easy
Question
How many mirrors are used in a periscope?
- 1
- 2
- 3
- 0
Hint:
There are 2 plane mirrors used which are placed parallel to each other.
The correct answer is: 2
- A periscope includes two mirrors or reflecting prisms.
- To change the direction of the light coming from the scene observed:
- the first deflects it down through a vertical tube,
- the second diverts it horizontally so that the scene can be viewed conveniently.
- So, the correct option is d.
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