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Reflection

In a periscop...

Question

In a periscope, plane mirrors are fixed at the bends of the tube at an angle of _________ with the side of the tube.

30^{o}

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90^{o}

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45^{o}

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60^{o}

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Solution

The correct option is B $45^{o}$
In a periscope two plane mirrors are fixed at the bends of the tube at an angle of $45^{o}$ with the side of the tube.The inner side of the tube is blackened to avoid any unwanted reflection of light.

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Similar questions

How are the two plane mirrors in a periscope arranged:

(a) with respect to one another?

(b) with respect to sides of the tube?

a, b, c

d

a

b

30^{o}

c

45^{o}

d

60^{o}

\frac{{tan}^{2} 60^{o} + 4 {sin}^{2} 45^{o} + {sin}^{2} 90^{o}}{3 {sec}^{2} 30^{o} + {csc}^{2} 60^{o} - {cot}^{2} 30^{o}}

\frac{{tan}^{2} 60^{o} + 4 {cos}^{2} 45^{o} + 3 {sec}^{2} 30^{o} + 5 {cos}^{2} 90^{o}}{c o sec 30^{o} + sec 60^{o} - {cot}^{2} 30^{o}}

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