CBSE Optics Theory Paper – 2 Question Paper Class 12th (2010)

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Series OSS                                                                                                                       Code No. 138

                                                                                (Theory) Paper II

Time allowed : 3 hours                                                                                         Maximum Marks :30

Instructions :  Attempt all questions.



1. (i) Describe the optical imagery of convex lenses and draw diagrams.    5
   (ii) What is astigmatism ? Describe and draw “Sturm’s conoid”.    5


2. Describe briefly the following :
(i) Spherical and chromatic aberration in a thick glass    5
(ii) Protective glasses : types and uses    5


3. Write short notes on the following :
  (i) Uses and advantages of lens combinations    4
(ii) Types of bifocal lenses and advantages of each    3
(iii) Types and materials of contact lens    3

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