An object is placed 20 cm in front of a plane mirror. The mirror is moved 2 cm towards the object. The distance between the positions of the original and final images seen in the mirror is:
  • 2 cm
  • 4 cm
  • 10 cm
  • 22 cm
A ray of light that strikes a plane mirror PQ at an angle of incidence of 30o, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. The angle of reflection at the second mirror is:
  • 30°
  • 45°
  • 60°
  • 90°
An object is placed at 100 mm in front of a concave mirror which produces an upright image (erect image). The radius of curvature of the mirror is:
  • Less than 100 mm
  • Between 100 mm and 200 mm
  • Exactly 200 mm
  • More than 200 mm
Which position of the object will produce a magnified virtual image, if a concave mirror of focal length 15 cm is being used?
  • 10 cm
  • 20 cm
  • 30 cm
  • 35 cm
A concave mirror produces a magnification of +The object is placed:
  • At the focus
  • Between focus and centre of curvature
  • Between focus and pole
  • Beyond the centre of curvature
A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of light:
  • Is refracted towards the normal
  • Is refracted away from the normal
  • Is reflected along the same path
  • Does not get refracted
A lens of focal length 12 cm forms an erect image, three times the size of the object. The distance between the object and image is:
  • 8 cm
  • 16 cm
  • 24 cm
  • 36 cm
0:0:1



Answered

Not Answered

Not Visited
Correct : 0
Incorrect : 0