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
Reflection of Light
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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.
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