State the working of iris?

Differentiate between regular and diffused reflection. Does diffused reflection mean the failure of the laws of reflection?

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.

Polished wooden table

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.

Chalk powder

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.

Cardboard surface

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.

Marble floor with water spread over it

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.

Mirror

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.

Piece of paper

State the laws of reflection.

Describe an activity to show that the incident ray, the reflected ray and the normal at the point of incident lie in the same plane.

A person 1 m in front of a plane mirror seems to be _____ m from his image.