12th physic reflection of light test paper

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By vip sir

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                           UNIT - 6  ( OPTICS)            

                            REFLECTION OF LIGHT


OBJECTIVE QUESTIONS :

QUESTION 1. MULTIPLE CHOICE QUESTIONS : ( EACH 1 MARKS) 

  1. The magnified produced by convex mirror is - 

  1. 1              b)  Less than 1        c) More than 1        d) None of these 

      2.   Mirror used in search lights - 

  1. Convex mirror (b) Spherical concave mirror(c) Parabolic mirror(d) parabolic convex 

QUESTION 2. FILL IN THE BLANKS:  ( EACH 1 MARKS) 

  1. A ray of light is incident normally on the surface of mirror, then the angles of reflection will be ______. 

  2. The concept of conjugate focus is true for ______ image only which are formed by _______ mirror. 

  3. A spherical mirror kept in water, the focal length of the mirror is ________. 

  4. The focal length of convex mirror is 20 cm,then it's radius of curvature will be _____.

QUESTION 3. ONE WORD QUESTIONS (EACH 1 MARKS) . 

  1. When the image of concave mirror cannot be obtained on the screen. 

  2. The focal length is different for different colours of lights. 

  3. If the angle between incident ray and reflected ray is 60, then what is the angle of incident? 

  4. How to reduce parallax? 

QUESTION 4. Explain spherical aberration?              (2)

QUESTION 5. Write down difference between regular reflection and diffused reflection?    (2)  

QUESTION 6. Define reflection of light?write down its laws.                   (3) 

QUESTION 7. Write down the  uses of concave and convex mirror?      (3) 

QUESTION 8. An object is placed infront of  concave mirror. 

  1. In between focus and pole 

  2. At centre of curvature 

       Draw a ray diagram and write down the position, and nature of the image.        (4) 

QUESTION 9.The focal length of concave mirror is 15cm. Then find the position of object to obtain a real image three times bigger than the object.                                              (4)

QUESTION 10. Define linear magnification? Drive relation between focal length and redius of curvature in convex mirror.                                                                                      (4) 

QUESTION 11. What is mirror formula? State and prove it.    (5)


                                             § BEST OF LUCK §




By vikas lodhi

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