The focal length of a plane mirror is
  • - 1
  • Infinity
  • Zero
  • +1
Which of the following letter does not show lateral inversion?
  • I
  • F
  • G
  • L
When a mirror is rotated through an angle θ, the reflected ray from it turns through an angle of
  • θ
  • θ/2
  • 2θ
  • none of the above
Which among the following is not true for a plane mirror?
  • Image is always formed at infinity
  • Image formed is always erect.
  • Lateral inversion always takes place in a plane mirror
  • Image formed by a plane mirror is always virtual
The power of a lens of focal length 50 cm is
  • 0.5 D
  • 10.5 cm
  • 2D
  • 0.5 D
According to the new cartesian sign convention,
  • Focal length of convex mirror is negative and that of concave mirror is positive.
  • Focal length of both, convex and concave mirror is negative.
  • Focal length of both, convex and concave mirror is positive.
  • Focal length of convex mirror is positive and of concave mirror is negative.
Angle of reflection is
  • the angle between the incident ray and the normal.
  • the angle between the reflected ray and the incident ray.
  • the angle between the reflected ray and the mirror surface.
  • the angle between the reflected ray and the normal.
In order to get a diminished and virtual image, the object can be placed anywhere in front of a:
  • Convex mirror
  • Plane mirror
  • all these mirrors
  • Concave mirror
Which lens always forms diminished and erect image?
  • Convex lens
  • Concave lens
  • Converging lens
  • Both convex and concave
A spherical mirror and a thin spherical lens have each a focal length of -12 cm. The mirror and the lens are likely to be:
  • Both concave correct
  • Both convex
  • The mirror is concave and the lens is convex.
  • The mirror is convex and the lens is concave.
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0