ET unit 9 -- optical devices

What is the magnification of an image if m = > 1 ?

• reduced in size

• magnified

• no magnification

What happens to light as it meets a translucent material?

• all of the light energy is absorbed

• the light rays bend and cause the image to be lower

• it is scattered, but does pass through

• it passes through with no loss of energy

Can Callie see Ellie in the mirror?

• Yes

• No

Who can B see?

• A C

• C D

• all of them

• C D E

What is the name and function of diagram A?

• a lens that reflects light

• a prism that reflects light

• a lens that refracts light

• a mirror that reflects light

What is the name and function of diagram B?

• a prism that reflects light

• a lens that refracts light

• a mirror that reflects light

• a prism that disperses light

An image is formed because each light ray that falls on the surface results in a single reflected ray at the same angle

• prism refraction

• specular reflection

• diffuse reflection

• magnified reflection

A perfectly _____ object absorbs 100% of any light energy and completely stops light rays.

• magnified

• specular

• opaque

• transparent

_______ disperses light into its individual colors.

• a transparent medium

• a lens

• a mirror

• a prism

What optical device is used in eyeglasses?

• lens

• mirror

• prism