Physics
How many plane mirrors are used in a periscope and kaleidoscope ?
- 2 and 3 respectively
- 3 each
- 3 and 2 respectively
- 2 and 4 respectively
Reflection
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Answer
2 and 3 respectively
Reason — In a periscope two parallel plane mirrors each inclined at 45° with the vertical walls are placed facing each other. In a kaleidoscope three plane mirrors inclined with each other at 60° are used.
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