Practice Test | Kullabs.com
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  • If an incident ray passes through the centre of curvature of a spherical mirror, the reflected ray will _______.

    move in the same path
    pass through the focus
    pass between the centre of focus and pole
    pass through the pole
  • An image formed by a convex mirror is always ______.

    real, inverted and diminished
    real, erect and magnified
    virtual, real and magnified
    virtual, erect and diminished
  • The energy that gives us sensation of sight is called ______.

    potential energy
    electrical energy
    light energy
    mechanical energy
  • The individual unit of light is called ______.

    beam
    gluon
    photon
    atom
  • Path of a light beam is ______.

    parallel to the ground
    depends on medium
    sometimes straight sometimes curved
    curved
  •  A light beam can be _______.

    reflected
    all of the answers are right
    refracted
    sometimes straight sometimes curved
  • The spherical mirror whose inner surface is reflective is called ______.

    plain mirror
    concave mirror
    reflective mirror
    convex mirror
  • The concave mirror is also called ______.

    both
    converging mirror
    diverging mirror
    none
  • Convex mirror is also called ______.

    conversing mirror
    both answers are right
    diverging mirror
    none are right
  • The image formed by a concave mirror is ______.

    erect
    real
    bigger
    depends on where it is placed
  • The image formed by convex mirror is ______.

    inverted
    smaller than object
    all of the above answers are right
    real
  • In concave mirror what is the location of the image formed when an object is at infinity?

    at the principal focus
    at the center of curvature
    in between center of curvature and principal focus
    beyond center of curvature
  • In concave mirror what is the location of the image formed when an object is in between infinity and C?

    beyond center of curvature
    at the principal focus
    in between center of curvature and principal focus
    at the center of curvature
  • In concave mirror what is the location of image formed when object is at center of curvature ?

    beyond center of curvature
    at the center of curvature
    in between center of curvature and principal focus
    at the principal focus
  • What is the size of the image when the object is placed at the center of curvature of concave mirror?

    same size of the object
    incomplete information to deduce the answer
    larger than object
    smaller than object
  • The reason for using convex mirror in cars is because ______.

    convex mirror always form an erect image so easy identification of object
    convex mirror forms bigger image so it is easier see the object
    convex mirror has narrow field of view so it is easier to focus on traffic
    all of the answers are correct
  • Light is a form of energy produced by a ______.

    opaque object
    luminous object
    non-luminous object
    transparent object
  • An example for non-luminous object is ______.

    the moon
    an electric bulb
    the sun
    a candle
  • The phenomenon by which the incident light falling on a surface is sent back into the same medium is known as ______.

    Polarization
    Refraction
    reflection
    Absorption
  • When light is incident on a polished surface ______ reflection takes place.

    diffused
    irregular
    regular
    normal
  • An object becomes invisible when it undergoes ______reflection.

    diffused
    regular
    irregular
    normal
  • The image formed by a plane mirror is  ______.

    real and inverted
    real and erect
    virtual and inverted
    real or virtual
  • The centre of the sphere of which the spherical mirror forms a part is called ______.

    focus
    centre of curvature
    pole
    vertex
  • The focus of a concave mirror is _______.

    undefined
    virtual
    Real
    at the pole
  • A converging mirror is known as ______.

    convex mirror
    concave mirror
    cylindrical mirror
    plane mirror
  • Radius of curvature of a concave mirror is always ______ to the mirror.

    perpendicular
    inclined at 60o
    Parallel
    inclined at 45o
  • If the image formed by a concave mirror is virtual, erect and magnified, then the object is placed

    at the centre of curvature
    between the pole of the mirror and the focus
    beyond the centre of curvature
    at the focus
  • Dentists use a _____________ to focus light on the tooth of a patient.

    cylindrical mirror
    convex mirror
    concave mirror
    plane mirror
  • An object is placed 1.5 m from a plane mirror. How far is the image from the person?

    2 m
    3 m
    1.5 m
    1 m
  • An object placed 2m from a plane mirror is shifted by 0.5 m away from the mirror. What is the distance between the object and its image?

    5 m
    1.5 m
    3 m
    2 m
  • What is the angle between the incident and reflected rays when a ray of light is incident normally on a plane mirror?

    90o
    45o
    0o
    180o
  • Name the type of image that can be obtained on a screen.

    Diverging
    Converging
    Real
    virtual
  • A ray of light is incident on a plane mirror and the angle of incidence is 25o. What is the angle of reflection?

    00
    50o
    25o
    90o
  • A ray of light is incident on a plane mirror and the angle of reflection is 50o. Calculate the angle between the incident ray and the reflected ray.

    90o
    50o
    25o
    100o
  • Which of the following is used to make a periscope?

    Lens
    Concave mirror
    Convex mirror
    Plane mirror
  • Which mirror has a wider field of view?

    Concave mirror
    Convex mirror
    Cylindrical mirror
    Plane mirror
  • The focal length of a concave mirror is 15 cm. What is its radius of curvature?

    7.5 cm
    15 cm
    45 cm
    30 cm
  • A ray of light passing through the ______ retraces its path.

    centre of curvature
    Pole
    vertex
    Focus
  • When an object is placed at the focus of a concave mirror, the image will be formed at ______.

    pole
    centre of curvature
    infinity
    focus
  • Butter paper is an example for ______ object.

    a translucent
    an opaque
    a luminous
    a transparent
  • An object of size 2.0 cm is placed perpendicular to the principal axis of a concave mirror. The distance of the object from the mirror equals to the radius of curvature. The size of the image will be ______.

    1.0 cm
    0.5 cm
    2.0 cm
    1.5 cm
  • If an incident ray passes through the centre of curvature of a spherical mirror, the reflected ray will ______.

    pass through the focus
    retrace its path
    pass through the pole
    pass through the centre of curvature
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