Question

Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes. Justify your answer in each case.
(a) Polished wooden table
(b) Chalk powder
(c) Cardboard surface
(d) Marble floor with water
(e)Mirror
(f) Piece of paper

Answer 1

Regular reflection occurs at perfectly smooth surfaces and diffused reflection occurs at rough surfaces.

(a) Polished wooden table: Regular reflection since surface becomes smooth as it is unpolished.

(b) Chalk Powder: Diffused reflection since surface of chalk powder is very rough.

(c) Cardboard surface: Diffused reflection since surface of chalk powder is rough.

(d) Marble floor with water: Diffused reflection since surface of water is not even.

(e) Mirror: Regular reflection since surface of mirror is smooth.

(f) Piece of paper: Diffused reflection since surface of paper is rough.