7
Virtual images.
With two mirrors at right angles you will have 3 (360/90 - 1) images of an object. Two of these are primary and the third is secondary. Some light rays from the object bounce of each of the mirrors to your eye to form the two primary images. But there are other rays that bounce off a mirror onto the second mirror before they get to you. This produced the secondary image.
Depending on the angle between them, you will get multiple reflections of any object between the mirrors. If the mirrors meet at an angle of x degrees, an object placed between them should generate a maximum of (360/n) - 1 images. Parallel mirrors should, on that basis, produce an infinite number of images but because of microscopic flaws in the mirror, absorption, internal refraction etc, the images will degrade more or less exponentially.
Very many. The glass of real mirrors is not perfectly clear and the reflective coating of real mirrors is not perfectly reflective so the images dim. But is not hard to get 50 or more spots of light when shining a laser pointer into such a mirror configuration. ------------------------------------------------------------ Edit:Actually, when you look at one of these mirrors, the number of images will increase continuously at the velocity "c", so you can accept that its limit is infinite, but in other hand it's finite because the speed of light "c" is finite, it's a physical "optical" paradox.
When two lines are perpendicular to each other such as L a right angle is formed which is 90 degrees.
at 120 degrees
Virtual images.
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.
As we place two mirrors inclined with each other then many images are formed. If @ is the angle of inclination then number of images is got by the formula [360/@] - 1 Hence as we place the two mirrors at right angles ie 90 degree then number of images will be 3 If both mirrors kept parallel facing each other then infinite images are formed.
If the mirrors are exactly parallel - there will be an infinite number of images, as they will be reflected indefinitely.
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.
Due to multiple reflection!
1/5
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.
The number of images of an object placed between two mirrors inclined at an angle is give by:Number of images= (360/ angle of inclination)-1
With two mirrors at right angles you will have 3 (360/90 - 1) images of an object. Two of these are primary and the third is secondary. Some light rays from the object bounce of each of the mirrors to your eye to form the two primary images. But there are other rays that bounce off a mirror onto the second mirror before they get to you. This produced the secondary image.
Since no of images = 360/theta -1 then 360/90-1 4-1 == 3