Question : The materials through which things cannot be seen are called _______.

Option 1: translucent materials

Option 2: transparent materials

Option 3: opaque materials

Option 4: pale materials

Question : The materials through which objects can be seen but not clearly are known as

Option 1: conducting materials

Option 2: translucent materials

Option 3: transparent materials

Option 4: opaque materials

Question : Choose the word that can substitute the given group of words.

That can be seen through.

Option 1: Defatigable

Option 2: Transparent

Option 3: Opaque

Option 4: Reverent

Question : _________are formed when an opaque object comes in the path of light.

Option 1: Mirror reflections

Option 2: Shadows

Option 3: Translucent rays

Option 4: Transparent rays

Question : The substances which reduce friction are called _______.

Option 1: fluids

Option 2: magnets

Option 3: springs

Option 4: lubricants