Two plane mirrors are placed making an angle theta in between them for an object placed between the mirrors if angle is gradually increased from 0 degree to 180 degree how will the number of images change increase decrease or remain unchanged

 

Asked by pritiswansi1996 | 28th Feb, 2021, 05:22: PM

Expert Answer:

If the angle between plane mirrors is zero, i.e. when mirrors are parallel and placing each other, we get infinite number of images.
 
If the angle between plane mirrors is 180o , we get only one image.
 
In between , if angle between the plane mirror is θ such that 360/θ = n and n is even we get n-1 images
 
If n is odd , we get n images
 
Hence when angle between plane mirrors changes from 0 to 180 , number of images changes from infinity to one.
 
As the angle increases number of images decreases.

Answered by Thiyagarajan K | 28th Feb, 2021, 06:07: PM