Lens

what is A on the diagram?

• center of curviture

• focal length

• reflected ray

• focal point

Most eyeglasses use which type of lens?

• Concave

• Prismatic

• Objective

• Convex

The above lens is a type of ___.

• diverging lens

• converging lens

• divergent lens

• convergent lens

Tags

NGSS.MS-PS4-2

Rays of light from a point object, after refraction through the lens actually meet to form an image.

• real image

• virtual image

• actual image

• erect image

Tags

NGSS.MS-PS4-2

A lens that is thicker in the middle than on the outside is called ___.

• diverging

• concave

• convex

• achromatic

A lens that is thinner in the middle than on the outside is called ___.

• diverging

• concave

• convex

• achromatic

A real image...

• is produced by virtual rays and can be projected on a screen

• is produced by real rays and cannot be projected on a screen

• is produced by virtual images and cannot be projected on a screen

• is produced by real rays and can be projected on a screen

How does a concave lens differ from a convex lens?

• A convex lens is another way to describe a plane mirror; a concave lens is curved

• A concave lens is curved inward on both sides; a convex lens is on only one side

• A convex lens has a thick center and thin edges, a concave lens has a thin center and thicker edges

• A convex lens has a thin center and thick edges. a concave lens has a thick center and thinner edges

A concave lens has an inward curved shape. It refracts light outward from the lens. They light rays spread apart as they exit the lens. Which represents a concave lens?

• A

• B

• A and B

• neither A or B

___ is when light travels through a material and bends.

• Diffraction

• Dispersion

• Mirage

• Refraction