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8 Science Ch 4

Light and Color Quiz

QuestionAnswer
The primary colors of light are... red, green, and blue
How would a tomato look under blue light? the tomato would appear black
When the surface of a mirror curves inward, like the inside of a bowl, it is called a... concave mirror
A flat sheet of glass with a silver-colored coating on one side is a... plane mirror
What happens when parallel rays of light hit a smooth surface? regular reflection
A laser beam can travel through a curled-up optical fiber because of... total internal reflection
Clear glass, water, and air are examples of what kind of material? transparent
A material that reflects or absorbs any light that strikes it is... opaque
Rods and cones are the light-sensitive cells on the... retina
The transparent front surface of the eye is called the... cornea
Farsightedness can usually be corrected using... convex lenses
Long, thin strands of glass or plastic that carry light for long distances without allowing the light to fade are called... optical fibers
Any two primary colors of light combined in equal amounts produce... a secondary color
What instrument is used in holography? laser
Which device uses lenses to focus light rays and record an image of an object on photographic film? camera
The bending of light rays as they enter a new medium is called... refraction
What instrument use lenses or mirrors to collect and focus light from distant objects? telescopes
What happens when light passes from air into water? the light slows down
What occurs when parallel rays of light hit a rough or bumpy surface? diffuse reflection
What type of image does a plane mirror produce? virtual and upright
Frosted glass and wax paper are... translucent
An image of a distant object caused by refraction of light is called a... mirage
The colored ring of muscle that controls the size of the pupil is called the... iris
Because the light rays never meet, a concave lens can produce... only a virtual image
A curved piece of glass or other transparent material that is used to refract light is called a... lens
The signals generated by the rods and cones are carried to your brain by the... optic nerve
A person is nearsighted if he or she... has eyeballs that are a little too long
Why are lasers useful in surgery? Laser incisions usually heal faster than scalpel cuts
A laser produces light that... is coherent
Colored substances that are used to color other materials are called... pigments
A secondary color of light is produced by mixing _____ primary colors together. two
To focus light, muscles in the eye change the length and thickness of the _______. lens
A mirage is caused by ________ as light passes through layers of air at different temperatures. refraction
Nearby objects appear blurry to a person who is ________. farsighted
The eyepiece of a telescope or microscope ________ an image. magnifies
Light waves that are in step, or have crests aligned with crests, are said to be __________. coherent
A _______ image is formed where light rays meet at a point. real
A transparent material _______ light. transmits
A white carpet will appear red when viewed through a red filter because the filter _______ red light only. reflects
Created by: 8thgraders
 

 



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