When an object is placed between two parallel mirrors, then number of images formed are

Fill in the blank spaces with appropriate answers: An object is placed between two parallel mirrors. The number of images formed is _________.

If an object is palced between two parallel mirrors ,an infinite number of images result .Suppose that the mirror are a distance 2b apart and the object is put at the mid-point between the mirrors ,Find the distance of the image from the object.

If an object is palced between two parallel mirrors ,an infinite number of images result .Suppose that the mirror are a distance 2b apart and the object is put at the mid-point between the mirrors ,Find the distance of the image from the object.

Two plane mirrors are inclined at an angle of 60^(@) . An object is placed between the mirrors. The number of images formed by the two mirrors is