Question

How are different materials grouped depending on transparency.

Answer 1

All materials can be divided into three groups on the basis of transparency as follows -
(i) Transparent materials: Materials that allow all the light to pass through them are transparent materials. Examples: Glass, water and air.
(ii) Translucent materials: Materials that allow only a small amount of light to pass through them are translucent materials. Examples: Butter paper, coloured glass and muddy water.
(iii) Opaque materials: Materials that do not allow any light to pass through them are opaque materials. Examples: Cardboard, wood, metals, bricks, stones and books.