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.