Chapter 6 multiple choice

A ........ is thicker in the middle than at the edges.

• converting lens

• Plano concave lens

• diverging lens

A ......... is thinner in the middle than at the edges.

• converting lens

• Plano convex lens

• diverging lens

Both real and virtual images can be formed by a .......... lens.

• convex

• concave

• diverging

The virtual image formed by a ......... lens is larger than the object.

• convex

• concave

• diverging

The virtual image formed by a.......... lens is smaller than the object.

• convex

• concave

• converting

The object and its image are on the same side of the convex lens.The image is...........

• real, larger than the object

• virtual, larger than the object

• virtual, smaller than the object

The focal length of the lens is given as ..........

• f =1/u +1/v

• f =u+v

• 1/f =1/u +1/v

If the power of a lens is +2D, it's focal length is ......... .

• 2 cm

• 5 cm

• 50 cm

The power of a lens of focal length +10 cm is.........

• 1 D

• 10 D

• 100 D

The unit of power of a lens is.......... .

• watt

• kilowatt

• dioptre