Mirrors,Lenses,and the Eye Lesson 3

Colors

Light levels have to be high in order to see vivid ___________.

Convex

A ____________________ mirror has a reflecting surface that curves outward.

Concave

A _______________________ mirror has a reflecting surface that curves inward.

Convex Lens

A ________________________ curves outward on at least one side.

Inward

A concave lens is curved __________________________.

Regular

A smooth surface reflects light rays traveling in the same direction at the same angle; this is called _____________________ reflection

Lens

A transparent object with at least one curved side that causes light to change direction is called a _______________________

Plane

An ____________________ mirror is a flat reflecting surface.

Mirror

Any reflecting surface that forms an image is a ___________________.

Lens

Behind your iris is the _____________________ which is transparent tissue that helps focus an object.

black

If all colors of visible light are absorbed, we see the object as _____________________.

white

If all colors of visible light are reflected, we see the object as _________________.

Closer

If an object is _________________than one focal length from a concave mirror, the image of that object will be larger and right side up.

More

If the object is ____________________ than one focal length from a concave mirror,the image will be upside down.

Right Side Up

Images in a convex mirror are always ____________________ and smaller than the original object.

Contracts

In bright light, the iris ______________________,and the pupil becomes larger.

Focal Point

Parallel light rays reflect through one _________________________.

Pupil

The _____________________ is an opening that leads to the inside of your eye.

Cornea

The _______________________ is the first part of your eye that light rays travel through.

Iris

The _________________________ controls the amount of light entering the eye.

Shape

The ______________________________ of a mirror's affects how the image appears.

Retina

The back of the eye has a layer of light-sensitive cells called the __________________; images form on this layer.

reflects

The color that an object appears to be depends on the color that it _______________________.

Wave Length

The colors of an object depend on the __________________ of the light waves it reflects.

Transparent

The cornea is a convex lens made of _________________ tissue.

Smaller

The image formed by a concave lens appears to be upright,________________________,and closer to the lens than the original object.

Reversed

The image of a plane mirror is right-side up and ________________________.

cone

Three types of __________________ cells are sensitive to different wave lengths of light allowing us to see colors.

Diffuse

When a surface is not smooth, the reflected light rays travel in many different direction; this is called ______________________ reflection

Larger

When an object is less than one focal length from a convex lens, the image appears ______________________ and right side up.

Absorbs

When light waves of different wavelengths interact with an object, the object _____________________ some light waves and reflects others.

Nerve Signals

When reflected light comes in contact with your eye, the cone cells in your retina send ________________________to your brain.

Rod Cells

_________________________ in the retina fire when the levels of light are low.