What straight line is used to represent a light wave?
What is (a) ray ?
100
Any two colors that combine to form white ligth are called
A)secondary colors
B)pigments
C)complementary
What is complementary
100
The optical axis is an imaginary line that divides a mirror.
True or False
What is True
100
Able to see distant objects clearly but nearby objects apear blurry?
What is nearsighted
100
The complete reflection of light by the inside surface of a medium is called ?
What is total internal reflection
200
What is in the opening in the center of the Iris through which light centers the inside of the eye?
What is a Pupil
200
The three colors that can be used to make any other color are called
A)primary colors
B)complementary colors
What iis primary colors
200
To show how light travels and reflects,you can represent light waves as straight lines called ___
What is a Ray
200
The cells of the retina that respond to colors are called ...
What is cones
200
A _____ focuses light and records images on a film.
What is a Laser
300
What is an upright image formed where rays of light appear to meet or come from?
What is Virtual Image
300
What determines the color of a translucent object?
What is the light it transmits
300
An imaged formed when rays actually meet is called a(n) ____ _____
What is a Real Image
300
What part of the eye gives the eye its color?
What is Iris
300
Laser light consists of light waves that all have the same _____,or color.
What is laser
400
What is a reflection that occurs when parallel rays of light hit a rough surface and reflect at different angles?
What is Diffuse Reflection
400
What three things can happen light strikes an object?
What is reflected,transmitted,or obsorbs
400
What type of images(s) can concave mirrors form?
What is virtual images or real images
400
Where does the optic nerve begin?
What is at the blind spot
400
What are three dimensional photographs created by using the light from a laser?
What is a Hologram
500
What is a measure of the amount a ray of light bends when it passes from medium to another?
What is Index of Refracrion
500
What colors are used in four-colored printing?
What is Magenta,Cyan,Black,and Yellow
500
Why are objects in a car mirror closer than they appear?
What is to see a larger area within the area
500
What kind of lenses can enable a farsighted person to see more clearly?
What is convex
500
Circle the letter of each sentence that is true about optical fibers.
A)An optical fiber can carry only one telephone call at a time.
B)Doctors use optical fibers to examine internal organs.
C)Optical fibers make use of total internal reflection.
D)Optical fibers have led to great improvements in computer networks.