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How do ciliary muscles affect the functioning of eye?
Ciliary muscles are capable of contracting and relaxing. Therefore, they are able to change the thickness of eye lens, thereby changing its focal length. Changing focal length helps us to see the nearby and far-off objects distinctly.
Therefore, power of accomodation of the eye is due to the function of ciliary muscles.
Suppose you are in a dark room. Can you see object in the room? Can you see objects outside the room. Explain.
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.
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