TEST PAPER 17 : CHAPTER 3 : DISPERSION OF LIGHT & OPTICAL INSTRUMENTS

There are 13 questions in all and time limit is 45 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 3]

1. Arranging in the ascending order of wavelength, which one is true ?
   
   
   
   1. Blue, Green, Red
   2. Orange, Green, Red
   3. Blue, Yellow, Green
   4. Orange, Yellow, Green
      
   
   
2. Green + magenta = ______.
   
   
   
   1. Cyan
   2. Yellow
   3. Red
   4. White
      
   
   
3. In spectrum obtained with prism, which colour is deviated maximum ?
   
   
   
   1. Violet
   2. Green
   3. Orange
   4. Red
      
   
   

   SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 3]
   

4. Define : Dispersion of light.
5. Why does a green leaf appear green ?
6. Mention the principle of simple microscope.
   
   

   SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 8]
   

7. Why does dispersion of light occur ? Explain.
8. Explain : Primary and composite colours.
9. Why do defects of vision arise ?
10. Explain : Complementary colours.
    
    

    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
    

11. Explain : Farsightedness with diagram.
12. Draw the ray diagram to show the working of a compound microscope(diagram only).
    
    

    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
    

13. Explain subtractive method of mixing of pigments.