7.1 Formation of Images by Lenses

7.1 Formation of Images by Lenses

Multiple Choice

A convex lens is known as a __________ lens.

• converging

• diverging

Multiple Choice

Concave lens is known as a __________ lens.

• diverging

• converging

Multiple Choice

When light rays passing through a concave lens will __________.

• Diverge

• Converge

Multiple Choice

When light rays passing through convex lens will __________.

• Converge

• Diverge

Multiple Choice

Which of the following lenses is a diverging lens?

• Convex lens

• Concave lens

• Cylindrical shape lens

• Magnifying glass

Multiple Choice

The symbol of F means _____ _____.

• Focal point

• Focal length

• Optical center

• Principal axis

Multiple Choice

The symbol of f means _____ _____.

• Focal point

• Focal length

• Optical center

• Principal axis

Multiple Choice

The symbol of O means _____ _____.

• Focal point

• Focal length

• Optical center

• Principal axis

Multiple Choice

Which ray diagram is correct for convex lens?

Multiple Choice

The diagram shows a ray diagram for a convex lens.

Which point A, B, C or D is the optical centre?

• A

• B

• C

• D

Multiple Choice

Which of the following is a correct ray diagram for convex lens?

Multiple Choice

The diagram shows an object is placed in front of a convex lens. The focal length, f is 10 cm, and the object distance from the lens,u is 15 cm. What are the characteristics of the image formed?

• Real, inverted, magnified

• Real, inverted, diminished

• Virtual, upright, magnified

• Virtual, upright, diminished

Multiple Choice

What is the position of the object when the convex lens is used as a magnifying glass?

• The object is between 2F and F

• The object is at F

• The object is between F and Optical Centre

Multiple Choice

The diagram shows an object placed in front of a concave lens. What are the characteristics of the image formed?

• Real, inverted, magnified

• Real, inverted, diminished

• Virtual upright, magnified

• Virtual, upright, diminished