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

//Multiple Choice

A convex lens converges parallel rays of light at a point called the
{
~ Centre of curvature
~ Principal axis
~ Optical centre
= Focus
}

What is the focal length of a convex lens?
{
~ The distance between the lens and the object
= The distance between the lens and the focal point
~ The distance between the object and the image
~ The distance between the focal point and the image
}

Which of the following is a characteristic of a real image?
{
= It can be projected on a screen
~ It is always upright
~ It is always virtual
~ It is always magnified
}

//True or False

A convex lens always forms a real image. {F}

The image formed by a convex lens is always inverted when the object is beyond the focal point. {T}

A real image cannot be obtained on a screen. {F}

The focal length of a convex lens is the distance from the optical center to the object. {F}


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