Question

Mention against each of the following whether regular or diffused reflection will take place when a beam of light strikes.​

Answer 1

• Polished wooden table: Regular reflection
  A polished surface is an example of a smooth surface. A polished wooden table has a smooth surface. Hence, reflections from the polished table will be regular.
• Chalk powder: Diffused reflection
  Chalk power spread on a surface is an example of an irregular surface. It is not smooth. Therefore, diffused reflection will take place from chalk powder.
• Cardboard surface: Diffused reflection
  Cardboard surface is also an example of an irregular surface. Hence, diffused reflection will take place from a cardboard surface.
• Marble floor with water spread over it: Regular reflection
  Marble floor with water spread over it is an example of a regular surface. This is because water makes the marble surface smooth. Hence, regular reflection will take place from this surface.
• Mirror: Regular reflection
  Mirror has a smooth surface. Therefore, it will give a regular reflection.
• Piece of paper: Diffused reflection
  Although a piece of paper may look smooth, it has many irregularities on its surface. Due to this reason, it will give a diffused reflection.