A reflecting periscope uses:

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Single plane mirror inclined at an angle of

45 °

Two plane mirrors facing each other and inclined at an angle of

45 °

Two plane mirrors facing each other and inclined at an angle of

60 °

None of the above

answer is B.

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Detailed Solution

A reflecting periscope uses two plane mirrors facing each other and inclined at an angle of

45 °

. A reflecting periscope consists of a cardboard tube bent twice at

90 °

. At the bends of the tube of the reflecting periscope, the two plane mirrors are fixed in a manner such that they make an angle of

45 °

. Also, the problem with the reflecting periscope is that the dust settles on the plane mirrors.

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