Question

Fill in the blank:

Plane mirrors are arranged _______ to each other to get infinite number of images.

• A. perpendicular
• B. at ${45}^0$
• C. parallel
• D. at ${30}^0$

Answer 1

Answer: (C)

parallel

no of images formed(n) by to plane mirror is $n=(\frac{360}{\theta }-1)$
if plane mirror are arranged parallel to each other$\theta =0^0;n=\frac{360}{0}-1=\infty$
hence,Plane mirror are arranged parallel to each other to get a large number of reflected images.