Chapter 23, Sections 2 Chapter 23, Sections 2 and 3and 3

Mirrors and the EyeMirrors and the Eye

Essential Questions:Essential Questions:

What are the different mirrors?What are the different mirrors? How are the mirrors different?How are the mirrors different? What are some uses of the different What are some uses of the different

mirrors?mirrors?

Plane MirrorsPlane Mirrors

A plane mirror is a flat mirror.A plane mirror is a flat mirror. Reverse images from left to rightReverse images from left to right Image appears that same distance from Image appears that same distance from

the front of the mirror to the back to the the front of the mirror to the back to the mirrormirror

Image in the mirror is called a virtual Image in the mirror is called a virtual image.image.

Plane mirrorsPlane mirrors

Concave MirrorsConcave Mirrors

Mirrors that curve inward.Mirrors that curve inward. Images will be upside downImages will be upside down Also images can be real or virtual depending on Also images can be real or virtual depending on

how the light rays are passed through the focal how the light rays are passed through the focal pointpoint

Used in headlights and flashlightsUsed in headlights and flashlights

Concave MirrorsConcave Mirrors

Convex MirrorsConvex Mirrors

Mirrors that curve outwardMirrors that curve outward Images are right side upImages are right side up Images are all virtual.Images are all virtual. Used in side mirrors on cars and as Used in side mirrors on cars and as

security mirrors in businessessecurity mirrors in businesses

Convex MirrorsConvex Mirrors

A little more about mirrors and lensA little more about mirrors and lens

Convex mirrors and concave lens cause Convex mirrors and concave lens cause light rays to spread out.light rays to spread out.

Convex lens are thick in the middle.Convex lens are thick in the middle.

Eye EQsEye EQs

What are the parts of the eye?What are the parts of the eye? How does light enter the eye and get How does light enter the eye and get

interpreted?interpreted? What are some disorders of the eye?What are some disorders of the eye?

The eyeThe eye

Cornea (refracts)

Pupil

Iris

Lens (refracts)

Retina

Optic Nerve

Vitreous

Rods and ConesRods and Cones

Rods and cones are special cells that Rods and cones are special cells that process light.process light.

Rods allow us to see black, white, and Rods allow us to see black, white, and shades of grayshades of gray

Cones are red, blue, and green.Cones are red, blue, and green.

DisordersDisorders

Color Blindness: Problem in the conesColor Blindness: Problem in the cones

DisordersDisorders