Series OSS                                                                                                                       Code No. 138

                                                                                         OPTICS
                                                                                (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