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Ray Optics 1 Mark Creative Question Paper With Answer Key

12th Standard

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Physics

Time : 00:20:00 Hrs
Total Marks : 15

    Multiple Choice Question

    15 x 1 = 15
  1. A light bulb is placed between two mirrors (plane) inclined at an angle of 60°. Number of images formed are ________________.

    (a)

    2

    (b)

    4

    (c)

    5

    (d)

    6

  2. Two plane mirrors are inclined at an angle of no. The number of images of a point object placed between them will be _______________.

    (a)

    2

    (b)

    3

    (c)

    4

    (d)

    5

  3. To get three images of a single object, one should have two plane mirror at an angle of ______________.

    (a)

    30°

    (b)

    60o

    (c)

    90°

    (d)

    120°

  4. A man of length h requires a mirror of length at least equal to, to see his own complete image is _______________.

    (a)

    \(\cfrac { h }{ 4 } \)

    (b)

    \(\cfrac { h }{ 2 } \)

    (c)

    \(\cfrac { h }{ 2 } \)

    (d)

    h

  5. Two plane mirrors are at 45° to each other. If an object is placed between them then the number of images will be ________________.

    (a)

    5

    (b)

    9

    (c)

    7

    (d)

    8

  6. An object is at a distance of 0.5 in front of a plane mirror. Distance between the object and image is ___________.

    (a)

    0.5 m

    (b)

    1m

    (c)

    7

    (d)

    8

  7. A man runs towards a mirror at a speed 15m/s. The speed of the image relative to the man is _______________.

    (a)

    15 ms-1

    (b)

    30 ms-1

    (c)

    35 ms-1

    (d)

    20 ms-1

  8. The light reflected by plane mirror may form a real images ____________.

    (a)

    If the rays incident on the mirror are diverging

    (b)

    If the rays incident on the mirror are converging

    (c)

    If the object is placed very close to mirror

    (d)

    Under no circumstance

  9. A man is 180 cm tall and his eyes are 10 cm below the top of his head. In order to see his entire height right from toe to head, he uses a plane mirror kept at a distance of 1m from him. The minimum length of the plane mirror required is _____________.

    (a)

    180 cm

    (b)

    90 cm

    (c)

    85 cm

    (d)

    170 cm

  10. A small object is placed 10 cm in front of a plane mirror. If you stand behind the object 30 cm from the object and look at its image, the distance forced for your eye will be ____________.

    (a)

    60 cm

    (b)

    20 cm

    (c)

    40 cm

    (d)

    80 cm

  11. Two plane mirrors are at right angles to each other. A man stands between them and combs hair with his right hand. In how many of the images will he be seen using his right-hand __________.

    (a)

    None

    (b)

    1

    (c)

    2

    (d)

    3

  12. A ray of light is incident normally on a lane mirror. The angle of reflection will be _____________.

    (a)

    (b)

    90°

    (c)

    will not be reflected

    (d)

    None of these

  13. A plane mirror produces a magnification of ____________.

    (a)

    -1

    (b)

    + 1

    (c)

    Zero

    (d)

    Between 0 and + ∞

  14. When a plane mirror is rotated through an angle θ , then the reflected ray turns through the angle 2θ, then the size of the image _____________.

    (a)

    Is doubled infinite

    (b)

    Is halved

    (c)

    Remains the same

    (d)

    Becomes infinite

  15. What should be the angle between two plane mirror so that whatever be the angle of incidence, the incident ray and the reflected ray from the two mirrors be parallel to each other _____________.

    (a)

    60°

    (b)

    90°

    (c)

    120°

    (d)

    175°

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