Lens grade 10

Convex lens focus a real, point sized image at focus, the object is placed

• At focus

• Between F and 2F

• At infinity

• At 2F

A convex lens will make an image appear ______ if the object is placed between the focal point and the lens.

• Smaller and upside down

• Smaller and right side up

• Larger and upside down

• Larger and right side up

A concave lens will always produce a _____ image.

• Virtual , upright , smaller

• Real , inverted , smaller

• Real , inverted , larger

• Virtual , upright , larger

A convex mirror will always produce an image that is _____.

• Real , upside down , smaller

• Virtual , upright , same size

• Virtual , upright , smaller

• Virtual , upright ,larger

Is this a converging lens or a diverging lens?

• Converging

• Diverging

An image formed with a lens , that can be projected onto a screen , is called a _____ image.

• Virtual

• Real

• Imaginary

• Objective

What type of mirror is this?

• Convex

• Concave

• Parabolic

• Plane

Which of the following mirror is used by a dentist to examine a small cavity?

• Convex mirror

• Plane mirror

• Concave mirror

• Combination of convex and concave mirror

An object at a distance of 30 cm from a

concave mirror gets its image at the same point. The focal length of the mirror is

• – 30 cm

• 30 cm

• – 15 cm

• +15 cm

n object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get

• shortened and real

• enlarged and real

• enlarge and virtual

• diminished and virtual