Identify a mirror having focal length -35cm?
  • a. convex
  • b. concave
  • c. plane
An object of height 5 cm is placed at 30 cm from a concave mirror of focal lenght 15 cm.Which one is true
  • a. A virtual inverted image will be formed at 10 cm and will be of diminished size then object
  • b. A real erect image will be formed at 30 cm and will be of same size as the object
  • c. A real inverted image will be formed at 30 cm and will be of same size as the object
The image formed by a convex mirror for an object placed at infinity is?
  • a. Behind the mirror at the focus
  • b. Behind the mirror between focus and pole
  • c. in front of a mirror at the focus
  • d. None of these
No matter how far you stand from a mirror, your image appears erect. The mirror may be?
  • a. convex
  • b. concave
  • c. plane
  • d. either plane or convex
which of these is false for the plane mirror?
  • a. focal lenght is infinite
  • b. Power of the plane mirror is zero
  • c. Magnification produced is 1
  • d. None of these
Which mirror is used as rear-view mirror in vehicles?
  • a. convex
  • b. concave
  • c. plane
when an object is placed at infinity from the concave mirror,the image is formed at?
  • a. infinity
  • b. radius of curvature
  • c. focus
  • d. none of these
An object 5.0cm in length is placed at a distance of 20cm in front of a convex mirror of radius of Curvature 30cm. Find the position of the image?
  • a. 8.1cm
  • b. 8.6 cm
  • c. None of these
Find the nature of the image
  • a. Virtual, inverted
  • b. real inverted
  • c. virtual, erect
  • d. real, erect
Find the size of the image?
  • a. 7.1cm
  • b. 5cm
  • c. 2.2 cm
  • d. None of these
A concave mirror is a part of a sphere of radius 60cm. It's focal length is?
  • a. 60cm
  • b. 15cm
  • c. 30
  • d. infinity
A concave mirror produces three times magnified (enlarged) real image of object placed at 10 cm in front of it. Where is the image located?
  • a. 30 cm
  • b. 3.3 cm
  • c. 33 cm
  • d. none of these
A ray of light is incident on a concave mirror. If it is parallel to the principal axis, the reflected ray will
  • pass through the pole
  • retrace its path
  • pass through the focus
  • pass through the center of curvature
If an incident ray passes through the center of curvature of a spherical mirror, the reflected ray will
  • be parallel to the principal axis
  • pass through the focus
  • retrace its path
  • pass through the pole
To get an image larger than the object, one can use
  • a convex mirror but not a concave mirror
  • a plane mirror
  • either a convex mirror or a concave mirror
  • a concave mirror but not a convex mirror
A mirror forms a virtual image of a real object.
  • it must be a concave mirror.
  • it may be any of the mirrors mentioned above
  • it must be a convex mirror.
  • it must be a plane mirror.
Light cannot travel in a vacuum.
  • True
  • False
A ray of light incident parallel to the principal axis of a spherical mirror retraces its path after reflection
  • True
  • False
A ray starting from the focus of a concave mirror becomes parallel to the principal axis after reflection.
  • True
  • False
The angle of incidence is the angle between
  • the normal to the surface and the incident ray.
  • the reflected ray and the surface of the mirror.
  • the incident ray and the surface of the mirror
  • the normal to the surface and reflected ray.
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