$CATEGORY: Science - Khan Academy/9.Light-Reflection and Refraction/9.Light-Reflection and Refraction--Spherical Mirrors

//Multiple Choice

The magnification produced by a mirror is given by the formula\: {
    ~v/u
    ~hi/ho
    =Both (a) and (b)
    ~None of the above
}

If the magnification produced by a mirror is -2, the image formed is\: {
    ~Virtual and erect
    ~Virtual and inverted
    =Real and inverted
    ~None of the above
}

The magnification produced by a concave mirror is positive when the image formed is\: {
    ~Real and inverted
    ~Real and erect
    =Virtual and erect
    ~None of the above
}

In the magnification formula for mirrors, the sign of the magnification is positive when\: {
    ~The image is real
    ~The image is inverted
    =The image is virtual and erect
    ~None of the above
}

If an object is placed at the center of curvature of a concave mirror, the magnification of the image will be\: {
    ~1
    =-1
    ~2
    ~None of the above
}

The magnification produced by a convex mirror is always\: {
    =Positive and less than 1
    ~Negative and greater than 1
    ~Positive and greater than 1
    ~None of the above
}

If the magnification produced by a concave mirror is greater than 1, the image formed is\: {
    ~Smaller than the object
    ~Equal in size to the object
    =Larger than the object
    ~None of the above
}

For a convex mirror, the magnification is always\: {
    ~Negative
    =Less than 1
    ~Greater than 1
    ~None of the above
}

A concave mirror forms an image 4 times the size of the object. The magnification is\: {
    =-4
    ~4
    ~1/4
    ~None of the above
}

The magnification formula for a mirror is related to the object and image distances by\: {
    ~m\=v/u
    =m\=−v/u
    ~m\=u/v
    ~None of the above
}

//True or False

The magnification produced by a concave mirror is positive when the image is real and inverted. {F}

If the magnification produced by a mirror is greater than 1, the image is diminished. {F}

For a convex mirror, the magnification is always positive and less than 1. {T}

The magnification of a mirror is the ratio of the image distance to the object distance, with a negative sign for concave mirrors. {T}

If the magnification of a concave mirror is -1, the image is real, inverted, and equal in size to the object. {T}

A magnification of +2 means that the image is virtual, erect, and twice the size of the object. {T}

The magnification of a concave mirror is always negative when the object is beyond the focus. {T}

The magnification produced by a convex mirror is always negative. {F}

When the object is placed at the center of curvature of a concave mirror, the magnification is +1. {F}

If the height of the image is negative, the image is inverted, and the magnification is negative. {T}

A magnification of -2 means that the image is inverted and twice the size of the object. {T}

The magnification of a convex mirror is always less than 1. {T}


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