Question
Which of the following will cause regular reflection of light and which diffuse reflection of light?
$i.$ Polished wooden table.
$ii.$ Chalk powder.
$iii.$ Cardboard.
$iv.$ Mirror.
$v.$ Paper.
$vi.$ Marble floor with water spread over it.

Answer

Polished wooden table: Regular reflection since the surface is polished $($plane$).$
Chalk powder: Diffused reflection will occur because the surface of chalk powder is uneven.
Cardboard: Diffused reflection of light since cardboard has an uneven surface.
Mirror: Regular reflection since the surface of a mirror is plane.
Paper: Diffused reflection since the surface of paper is uneven.
Marble floor with water spread over it: regular reflection as the floor with water will behave as a plane surface.

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