Stand two plane mirrors on their edges and parallel to one another. Place a coin between them near one end. How many images do you see? Draw a ray diagram to explain the formation of the images.

To answer the question and understand how the images are formed, we can follow these steps and draw a ray diagram:

1. Draw two vertical lines parallel to each other, representing the plane mirrors.
2. Mark a point near one end of the mirrors, indicating the position of the coin.
3. Now, we need to draw the incident ray from the coin to the mirror surface. To do this, draw a straight line from the point on the coin towards the mirror surface at an angle.
4. According to the law of reflection, the angle of incidence (θi) equals the angle of reflection (θr) for each ray. Reflect the incident ray by making sure the angle of reflection is equal to the angle of incidence.
5. Repeat the process for the second mirror. Draw the reflected ray from the first mirror towards the second mirror's surface.
6. Now, extend the reflected rays such that they meet. The point where they intersect represents the position of the first image.
7. Since the rays are reflected off the mirror surfaces, they will continue to reflect between the mirrors. We can draw another set of reflected rays from the first image using the same process. Extend them until they meet, representing the second image.
8. By extending the pattern, you can observe that the rays continue reflecting between the mirrors, creating multiple images.

The diagram will illustrate the formation of these images, and you can count the number of images formed based on the pattern of reflections. The exact number of images will depend on the distance between the mirrors and the coin.

Note: It is worth mentioning that multiple reflections between the mirrors may result in increasingly faint and distorted images as the light intensity decreases with each reflection.