Science
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 spread over it
(e) Mirror
(f) Piece of paper
Answer
(a) Polished wooden table — Regular reflection
Reason — The polished wooden table has a smooth surface, hence, the reflections are regular.
(b) Chalk powder — Diffused reflection
Reason — Chalk powder spread on a surface will form an irregular surface, hence, the reflections are diffused.
(c) Cardboard surface — Diffused reflection
Reason — The surface of the cardboard is irregular, hence, the reflections are diffused.
(d) Marble floor with water spread over it — Regular reflection
Reason — Marble floor with water spread over it is a smooth surface, hence, the reflections are regular.
(e) Mirror — Regular reflection
Reason — A mirror has a very smooth surface, hence, the reflections are regular.
(f) Piece of paper — Diffused reflection
Reason — Piece of paper has many irregularities, hence, the reflections are diffused.
Related Questions
Suppose you are in a dark room. Can you see objects in the room? Can you see objects outside the room? Explain.
Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?
State the laws of reflection.
Describe an activity to show that the incident ray, the reflected ray and the normal at the point of incidence lie in the same plane.