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11



Maximum time: 40 minutes

Maximum marks: 23 marks


1.   Name the transparent membrane through which light enters the first in the eyes. (1)
2.   What is the function of iris? (1)
3.   What is persistence of vision? (1)
4.   What is Tyndall effect? (1)
5.   The image formed on retina is inverted but we can see the objects erect. Why? (1)
6.   What is night blindness and color blindness? (2)
7.   Distinguish between presbyopia and hypermyopia (3)
8.   Draw a well labeled diagram of eye. (4)
9.   Draw a labeled diagram of rainbow formation. Also explain the phenomena. (4)
10.   Name three refractive defects of vision with help of diagram. Explain its reasons and correction of these defects. ?(5)


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