A list of transparent objects contains names of objects through which light can pass completely. Such a list includes objects such as glass bottles, glass jars, pure water, clear plastic bottles, a petri dish, a concave lens, a convex lens and the pupil of the eye.
The pupil of the eye is a perfect example of a transparent object in nature and its functions. It would be impossible to see objects if the pupil were not transparent. Light passes completely through a normal pupil, and forms an image on the retina.
The shape of an object has nothing to do with transparency. An object can be large and heavy yet be transparent. An Olympic-sized swimming pool has thousands of gallons of water, yet the water is transparent, and the bottom of the pool is seen clearly.
Objects are classified into transparent, translucent and opaque objects depending upon how much light passes through them. If light cannot pass through an object, it is called an opaque object. Objects such as rocks, wood, thick paper, cardboard, paper plates, metal foil, granite and marble are all opaque objects.
If light passes through an object partially, it is called a translucent object. Oily paper, ground glass, tracing paper, oil, colored clear plastic and impure water are examples of translucent objects.