Five images.
Use this formula to get the number of images
[360/@] - 1
Here @ is the angle between the planes
So 360/60 - 1 = 6-1 = 5
If 2 mirrors are placed perpendicular to each other then infinite no of images will be formed because image formed by one mirror will act as the object for the other and vice verse.
1/5
Opposite each other
Due to multiple reflection!
They should be arranged so that they point in a direction that is 120 degrees away from the other two so that they are all 120 degrees from each other.
at 120 degrees
Virtual images.
7
To find out how many images are formed when plane mirrors are tilted at an angle, use the formula N=360/a-1 , wherein N is the number of images formed and a is the given angle. So in this case, N=360/30-1, will result to N=11 images formed.
If 2 mirrors are placed perpendicular to each other then infinite no of images will be formed because image formed by one mirror will act as the object for the other and vice verse.
If the mirrors are exactly parallel - there will be an infinite number of images, as they will be reflected indefinitely.
In theory, there should be infinitely many images. In practice, though, imperfections in the mirrors, diffusion in glass and the air gap between the mirrors mean that there are not infinitely many images.
1/5
When two mirrors are parallel to each other, an infinite number of images are formed due to the multiple reflections of an object between the mirrors. Each reflection creates a new image that is a mirror image of the previous one.
Due to multiple reflection!
Opposite each other
They should be arranged so that they point in a direction that is 120 degrees away from the other two so that they are all 120 degrees from each other.