$CATEGORY: Science - Khan Academy/10.Light-Reflection and Refraction/10.Light-Reflection and Refraction--Spherical Mirrors

//Multiple Choice

A concave mirror is also called a\: {
    =Converging mirror
    ~Diverging mirror
    ~Plane mirror
    ~None of the above
}

In a convex mirror, the image formed is always\: {
    ~Real and inverted
    =Virtual and erect
    ~Real and erect
    ~None of the above
}

Which type of mirror is used in vehicle rearview mirrors? {
    ~Plane mirror
    ~Concave mirror
    =Convex mirror
    ~None of the above
}

The focal length of a spherical mirror is\: {
    ~Twice the radius of curvature
    =Half the radius of curvature
    ~Equal to the radius of curvature
    ~None of the above
}

A parabolic mirror is preferred over a spherical mirror for focusing light because it\: {
    ~Is easier to manufacture
    =Reduces spherical aberration
    ~Is cheaper
    ~None of the above
}

Which type of mirror converges light rays to a point? {
    ~Convex mirror
    ~Plane mirror
    =Concave mirror
    ~None of the above
}

The focal length of a spherical mirror is\: {
    ~Twice the radius of curvature
    ~Equal to the radius of curvature
    =Half the radius of curvature
    ~None of the above
}

What type of image is always formed by a convex mirror? {
    ~Real and inverted
    =Virtual and erect
    ~Real and erect
    ~None of the above
}

In a concave mirror, if the object is placed at the focus, the image formed is\: {
    ~At the center of curvature
    =At infinity
    ~Virtual and magnified
    ~None of the above
}

The image formed by a convex mirror is always\: {
    ~Real and diminished
    ~Virtual and magnified
    =Virtual and diminished
    ~None of the above
}

Which mirror is used as a rearview mirror in vehicles? {
    ~Plane mirror
    ~Concave mirror
    =Convex mirror
    ~None of the above
}

If the object is placed at the center of curvature of a concave mirror, the image formed is\: {
    ~Real, inverted, and magnified
    =Real, inverted, and of the same size
    ~Virtual, erect, and diminished
    ~None of the above
}

A ray of light passing through the center of curvature of a concave mirror after reflection\: {
    ~Passes through the pole
    ~Passes through the focus
    =Retraces its path
    ~None of the above
}

The focal length of a convex mirror is\: {
    ~Positive
    =Negative
    ~Zero
    ~None of the above
}

Parabolic mirrors are preferred over spherical mirrors in telescopes because they\: {
    ~Are easier to manufacture
    =Reduce spherical aberration
    ~Are cheaper to produce
    ~None of the above
}

Which of the following is true for a parabolic mirror? {
    ~It suffers from spherical aberration
    =It does not suffer from spherical aberration
    ~It always forms real images
    ~None of the above
}

A parabolic mirror is most commonly used in\: {
    =Flashlights and headlamps
    ~Rearview mirrors
    ~Shaving mirrors
    ~None of the above
}

What is the shape of the reflecting surface of a parabolic mirror? {
    ~Spherical
    ~Cylindrical
    =Paraboloid
    ~None of the above
}

Parabolic mirrors are used in solar cookers because they\: {
    ~Form virtual images
    =Focus sunlight to a single point
    ~Disperse sunlight
    ~None of the above
}

Which of the following is an advantage of a parabolic mirror? {
    ~It suffers from spherical aberration
    ~It is more expensive than a spherical mirror
    =It eliminates spherical aberration
    ~None of the above
}

In a parabolic mirror, parallel rays of light converge at\: {
    ~The center of curvature
    =The focal point
    ~The pole
    ~None of the above
}

Why are parabolic mirrors used in satellite dishes? {
    ~To magnify the signals
    =To reflect signals to a single point (focus)
    ~To form a virtual image
    ~None of the above
}

//True or False

A concave mirror always forms a real image. {F}

Convex mirrors always form diminished, virtual, and erect images. {T}

The focal length of a convex mirror is positive. {F}

A parabolic mirror is free from spherical aberration. {T}

The image formed by a concave mirror is always inverted. {F}

Convex mirrors are used in solar cookers to focus sunlight at a single point. {F}

A concave mirror can form both magnified and diminished images. {T}

A parabolic mirror is commonly used in flashlights and headlamps. {T}

The image formed by a convex mirror is always real. {F}

In a concave mirror, the image is of the same size as the object when the object is placed at the center of curvature. {T}

A parabolic mirror eliminates both spherical and chromatic aberration. {F}

Convex mirrors provide a wider field of view than concave mirrors. {T}

Spherical mirrors are always used in telescopes. {F}

A ray of light passing through the center of curvature of a concave mirror retraces its path. {T}

Parabolic mirrors eliminate the problem of spherical aberration. {T}

The image formed by a concave mirror is always real. {F}

The focal length of a convex mirror is negative. {T}

//Fill in the blanks



//Match the following

Match the following items from Column A with their correct corresponding options from Column B\:
{
=Concave mirror -> Converging mirror
=Convex mirror -> Diverging mirror
=Parabolic mirror -> Reduces spherical aberration
=Focal length ->  Virtual and erect image
=Spherical mirror -> Always forms a virtual image
}


//******** END **********