Question

As you cannot see objects made from materials, such materials are called ……..
A) Transparent
B) Opaque
C) Translucent
D) None of these

Answer 1

Hint: We must have to know that materials usually look different from each other. Wood looks very different from iron. Iron appears different from copper or aluminum. At the same time, there may be some similarities between iron, copper and aluminum that are not there in wood.

Complete answer:
We must have to know that materials that have such lustre are usually metals. Iron, copper, aluminum and gold are examples of metals. Some metals often lose their shine and appear dull, because of the action of air and moisture on them. The property of a material through which we cannot see clearly is called translucency. The material through which we cannot see clearly is translucent material. These materials are semi permanent. This type of material only allows a little light to pass through them due to which an object cannot be seen clearly. For example: tissue, oiled paper. The property of a material through which we cannot see is called opaqueness and those materials are known as opaque materials. For example, books, books and wood. And the materials through which we can see clearly are known as transparent materials. For example Glass, Air.

Note:
We also need to remember that the material is classified in many properties which can be classification on basis of their appearance, hardness or softness, solubility or insolubility in water, heaviness or lightness and one which is asked in the question that is transparency, translucency or opaqueness. For example metals like gold or silver have luster in them.