Question

34.1 images and plane mirrors

two plane mirrors make an angle of 90° with each other. the maximum number of images of an object placed between them is

o more than four.
o three.
o one.
o two.
o four.

Explanation:

Step1: Recall the formula for the number of images formed by two plane mirrors

The formula for the number of images \(n\) formed by two plane mirrors at an angle \(\theta\) is \(n=\frac{360^{\circ}}{\theta}-1\) (when \(\frac{360^{\circ}}{\theta}\) is an integer).

Step2: Substitute the given angle into the formula

Given \(\theta = 90^{\circ}\), then \(n=\frac{360^{\circ}}{90^{\circ}}-1\).

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Answer:

three.