Why do you think you see a full image of yourself when you look at the mirror but you cannot see a reflection of yourself when you look at a book?

When you look at a mirror, you see a full image of yourself because mirrors have a smooth surface that reflects light in a regular manner. This is known as specular reflection. The light rays that come from your body hit the mirror and are reflected back to your eyes, allowing you to see your reflection.

On the other hand, a book does not have a smooth surface like a mirror. Instead, it has a rough surface that scatters light in all directions, a phenomenon known as diffuse reflection. When light rays hit the book, they are scattered in different directions, so they don't reflect back to your eyes in a way that would allow you to see your reflection.

In addition, the color and texture of the book can absorb some of the light, further reducing the amount of light that is reflected back to your eyes. This is why you cannot see a reflection of yourself when you look at a book.