Home / General Knowledge / Physics :: section - 9

General Knowledge :: Physics

  1. The type of mirror used in automobiles to see the traffic on the rear side is

  2. A.

     Concave

    B.

     Plano-Convex

    C.

     Plane

    D.

     Convex


  3. If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

  4. A.

     Concave mirror

    B.

     Convex mirror

    C.

     Plano-concave mirror

    D.

     Plane mirror


  5. Which one of the following reflects back more sunlight as compared to other three?

  6. A.

     Sand desert

    B.

     Land covered with fresh snow

    C.

     Prairie land

    D.

     Paddy crop land


  7. After reflection from a plane mirror the word will look like.

  8. A.

     AMBULANCE

    B.

     ECNALUBMA

    C.

     AMBULA CE

    D.

     AWBULANCE


  9. Convex mirror is generally used in ________

  10. A.

     Solar cookers

    B.

     Opthalmoscope

    C.

     Reflector for head light

    D.

     Rear view mirror


  11. In total internal reflection, the light travel from

  12. A.

     Rarer to denser medium and it occurs with no loss of intensity

    B.

     Denser to rarer medium and it occurs with no loss of intensity

    C.

     Rarer to denser medium and it occurs with loss of intensity

    D.

     Denser to rarer medium and it occurs with loss of intensity


  13. Convex mirrors are used as a rear view mirror in motor cycles because

  14. A.

     It forms real image

    B.

     It forms erect (upright) image

    C.

     It forms smaller image as compared with object

    D.

     All of the above


  15. A convex mirror of focal length f (in air) is immersed in a liquid (u=4/3). The focal length of the mirror in the liquid will be :

  16. A.

     F

    B.

     (4/3)f

    C.

     (3/4)f

    D.

     (7/3)f


  17. The phenomenon which causes mirage is

  18. A.

     Interference

    B.

     Diffraction

    C.

     Polarisation

    D.

     Total internal reflection


  19. Rear view mirror of car is convex or concave?

  20. A.

     Convex

    B.

     Concave

    C.

     Both A & B

    D.

     Can't be determined