Journey Through the Lenses

What type of lens make all the parallel rays striking the lens meet at the focus after refraction?

• biconcave lens

• converging lens

• diverging lens

• spherical lens

What kind of image is formed by diverging lenses?

• Always real

• Always virtual

• Could  be real or virtual, depends on the distance of the object from the focal point

• Could be real or virtual, but always real when the object is placed at the focal point

What type of lens is shown in the diagram?

• biconvex lens

• converging lens

• diverging lens

• spherical lens

An object is placed between the center of curvature and focus. Where will the image be formed?

• beyond the center of curvature

• at the center of curvature

• between the center of curvature and focus

• at the focus

A spherical lens has a focal length of -45 cm. What type of lens is used?

• converging lens

• diverging lens

• biconvex lens

• convex lens

At what position you will place an object in front of a converging lens so that no image will be formed?

• beyond C

• at C

• between C and f

• at f

What is the description of the image formed in the digram?

• real, inverted, reduced

• real, inverted, same size

• real, inverted, enlarged

• virtual, upright, enlarged

Where will you place an object in front of a converging lens so that it will create a virtual image?

• at C

• between C and f

• at f

• between f and v

What are the characteristics of the image formed by a diverging lens?

• real, upright, enlarged

• virtual, upright, enlarged

• real, upright, reduced

• virtual, upright, reduced

A parallel ray strikes the lens until its normal line, the refracted ray will ______________.

• pass through the second focus of the lens

• pass through the vertex of the lens

• pass through the center of curvature at the back of the lens

• refract at 45 degree angle