Q. 1. Differentiate among opaque, translucent and transparent materials, giving one example of each.

Those substances through which objects cannot be seen are termed as opaque substances. Example: wood, stone.

Those substances through which objects can be seen but not clearly are termed as translucent substances. Example: frosted glass, oiled paper.

Those substances through which objects can be seen clearly are termed as transparent substances. Example: crystal clear water, glass.