Light Reflection And Refraction Quiz!

24 Questions | Total Attempts: 316

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Light Reflection And Refraction Quiz!

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Questions and Answers
  • 1. 
    If an incident ray passes through the focus of the concave mirror the reflected ray will?
    • A. 

      Pass through the pole

    • B. 

      Parallel to the principal axis

    • C. 

      Retrace its path

    • D. 

      Passes through the centre of curvature

  • 2. 
    The refractive index of ice, salt & glass is 1.31 1.54, and 1.52 respectively which light travels faster and slower.
    • A. 

      Ice and class

    • B. 

      Glass and ice

    • C. 

      Ice and salt

    • D. 

      Salt and ice

  • 3. 
    Power of a lens is reciprocal of?
    • A. 

      Principal axis

    • B. 

      Principal focus

    • C. 

      Focal length

    • D. 

      Radius of curvature

  • 4. 
    When the object is placed between f and 2f of a convex lens the image formed is?
    • A. 

      At f

    • B. 

      At 2f

    • C. 

      Beyond 2f on the other side

    • D. 

      Between F &  2F on the same side

  • 5. 
    A Ray of light traveling from a rarer medium to a denser medium.
    • A. 

      Bend away from the normal

    • B. 

      Bend towards normal

    • C. 

      Go straight

    • D. 

      It does not bend

  • 6. 
     A student does the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He can get a correct measure of the angle of incidence and the angle of emergence by following the labeling indicated in figure:
    • A. 

      IV

    • B. 

      I

    • C. 

      II

    • D. 

      III

  • 7. 
    The image formed by the plane mirror is:
    • A. 

      Real and erected

    • B. 

      Real and inverted

    • C. 

      Virtual and erected

    • D. 

      Virtual and inverted

  • 8. 
    A concave mirror gives the real inverted and same size of the image and object is placed.
    • A. 

      At f

    • B. 

      At infinity

    • C. 

      At C

    • D. 

      Beyond c

  • 9. 
    The radius of curvature 200 CM it's focal length is:
    • A. 

      ,0.5 metre

    • B. 

      1 metre

    • C. 

      100 m

    • D. 

      25m

  • 10. 
    The diverging lenses:
    • A. 

      Concave lens

    • B. 

      Convex mirror

    • C. 

      Convex lens

    • D. 

      Concave mirror

  • 11. 
    The focal length of a lens or a mirror or lens is always half of the length of the radius of curvature.
    • A. 

      True

    • B. 

      False

  • 12. 
    Which of them is not paired correctly 1. Solar furnace -concave mirror 2.Rear​​​Rear view mirror -convex mirror 3. Magnifying glass -convex lens 4. Shaving mirror - convex mirror
    • A. 

      3

    • B. 

      2

    • C. 

      4

    • D. 

      3

  • 13. 
    Bending of light is called?
    • A. 

      Polarization

    • B. 

      Reflection

    • C. 

      Dispersion

    • D. 

      Refraction

    • E. 

      None of the above

  • 14. 
    The angle of incidence for a Ray of light having 0 reflection angle is:
    • A. 

    • B. 

      45°

    • C. 

      90°

    • D. 

      180°

  • 15. 
    The speed of the light in water is 2.5X10 power 8 metres per second if the speed of the lit in a vacuum is 3 X 10 power 8 metres per second. Calculate the refractive index of it travels From water to vacuum.
  • 16. 
    The laws of reflection hold good for?
    • A. 

      Plane mirrors only

    • B. 

      Concave mirrors only

    • C. 

      Convex mirrors only

    • D. 

      All the mirror irrespective of their shape

  • 17. 
    Light travels fastest in?
    • A. 

      Glass

    • B. 

      Air

    • C. 

      Vacuum

    • D. 

      Water

  • 18. 
    The image formed by a compound microscope is?
    • A. 

      Real and enlarged

    • B. 

      Real and diminished

    • C. 

      Virtual and enlarged

    • D. 

      Virtual and diminished

  • 19. 
    Which of them converge parallel light rays incident upon them?
    • A. 

      Concave mirror

    • B. 

      Plane mirror

    • C. 

      Convex mirror

    • D. 

      Both concave and convex

  • 20. 
    The image formed by the actual reflection of light is?
    • A. 

      Virtual and erected image

    • B. 

      Real and erected image

    • C. 

      Virtual and Enlarged image

    • D. 

      Real and inverted image

  • 21. 
    What will be the power of the lens if the focal length is reduced to 1 by 4?
    • A. 

      Power of lens doubles

    • B. 

      Power of lens reduced to half of it

    • C. 

      Power of lens increases by four times

    • D. 

      Power of lens decreases by 4 times

  • 22. 
    The center of the reflecting surface of a spherical mirror is called?
    • A. 

      Pole

    • B. 

      Principal axis

    • C. 

      Principal focus

    • D. 

      Centre of curvature

  • 23. 
    Whenever a Ray of light passes from denser to rarer:
    • A. 

      I=r

    • B. 

      I<r

    • C. 

      I>r

    • D. 

      R=i

  • 24. 
    The following is not the property of the image formed on the plane mirror.
    • A. 

      Images virtual

    • B. 

      Images laterally inverted

    • C. 

      Image is  same size of object

    • D. 

      Images real and same size

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