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

//Multiple Choice

If the object is placed at the focus (F) of a convex lens, the image will be
{
= At infinity
~ At the optical center
~ At 2F on the same side
~ Between F and 2F
}

When the object is placed at 2F in front of a convex lens, where is the image formed?
{
~ At infinity
~ At the focal point
= At 2F on the opposite side
~ Between F and 2F on the opposite side
}

Where is the image formed when an object is placed at infinity in front of a convex lens?
{
~ At the focal point on the same side
= At the focal point on the opposite side
~ At the optical center
~ Between the focus and the optical center
}

What is the nature of the image formed when an object is placed between the focal point (F) and the optical center (O) of a convex lens?
{
~ Real, inverted, and diminished
= Virtual, erect, and magnified
~ Real, inverted, and of the same size
~ Virtual, inverted, and magnified
}

What kind of image is formed by a convex lens when the object is placed beyond 2F?
{
~ Virtual, erect, and magnified
= Real, inverted, and diminished
~ Real, inverted, and magnified
~ Virtual, erect, and diminished
}

If the object is placed between 2F and F in front of a convex lens, where is the image formed?
{
= Beyond 2F on the opposite side
~ At 2F on the opposite side
~ At F on the same side
~ Between the lens and F on the same side
}

Where will the image be formed if the object is placed at a point between infinity and 2F?
{
~ Beyond 2F
~ At F
~ At infinity
= Between F and 2F
}

//True or False

When an object is placed at infinity, a convex lens forms a highly diminished and real image at the focal point. {T}

If the object is placed between the optical center and the focus of a convex lens, the image formed is real and inverted. {F}

A convex lens can form both real and virtual images depending on the position of the object. {T}

When an object is placed at 2F in front of a convex lens, the image formed is real, inverted, and magnified. {F}

A convex lens always forms a virtual image when the object is placed at infinity. {F}

If an object is placed at the focal point of a convex lens, the image is formed at infinity and is highly magnified. {T}

A convex lens always forms an inverted image. {F}

When the object is placed beyond 2F, the image formed by a convex lens is diminished, real, and inverted. {T}

If an object is placed at 2F, the image will also be formed at 2F on the opposite side and will be of the same size as the object. {T}

A real image can never be formed by a convex lens. {F}


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