Question

Two plane mirrors are inclined at angle 30° between them. Number of images seen of a tiny object kept between them is....

11 or 12

8 or 9

only 12

only 9​

Answer 1

Explanation:

it is submultiple of 180⁰ and 360⁰ so

N = 360⁰/ 30⁰ - 1

= 11

from 12 images one of the image is coincide .