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

 

S.No

Question

Reflection Type

Explanation

(a) 

Polished wooden table 

Regular Reflection

A polished wooden table has a smooth surface, so the reflection on a polished table will be regular reflection

(b)

Chalk powder

Diffused Reflection

Chalk powder if spread on a surface makes the surface diffused, so the reflection on a chalk powder is diffused reflection

(c) 

Cardboard surface 

Diffused Reflection

Cardboard surface is not smooth, so the reflection will be a diffused reflection

(d)

Marble floor with water spread over it

Regular Reflection

Marble floor with water spread over it is a smooth reflection. Water makes the marble smooth, so the reflection on the marble floor will be a regular reflection

(e) 

Mirror 

Regular Reflection

Mirror has a smooth surface, so the reflection on the mirror is a smooth reflection

(f) 

Piece of paper

Diffused Reflection

Since the surface of a piece of paper will be rough, it would produce a diffused reflection

 

 

  1. Class 8
  2. Chapter 16 Class 8 - Light

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.