Transparent Object – Objects through which light can travel without any obstruction and through which we can see objects are called as transparent objects.
Examples – Glass, air, clean water, some types of plastics etc.
Opaque Object – The objects through which light cannot travel at all and through which we are not able to see objects are called as opaque objects.
Examples – Metals, wood, cardboard, stones etc.
Translucent object – Objects which allow light to travel partially through them and through which we are not able to see them clearly are called as translucent object.
Examples – Oil dripped paper, butter paper, tracing paper, rough glass, etc.