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(D) The number of images $n$ formed by two plane mirrors inclined at an angle $	heta$ is given by the formula $n = \left( \frac{360^{\circ}}{	heta}

Vedclass · Accepted Answer

$90$

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(D) The number of images $n$ formed by two plane mirrors inclined at an angle $	heta$ is given by the formula $n = \left( \frac{360^{\circ}}{	heta} - 1 ight)$ if $\frac{360^{\circ}}{	heta}$ is an even integer.Given that the number of images $n = 3$, we substitute this into the formula:$3 = \frac{360^{\circ}}{	heta} - 1$$4 = \frac{360^{\circ}}{	heta}$$	heta = \frac{360^{\circ}}{4} = 90^{\circ}$Thus, the angle between the two plane mirrors should be $90^{\circ}$.

To get three images of a single object, the angle between the two plane mirrors should be (in $^{\circ}$)

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