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Study Guide Answers
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1.
Light is a(n) _______________________ form of energy.
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pure |
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2.
The _____________________________________ spectrum contains many kinds of electromagnetic waves.
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electromagnetic |
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3.
What produces electromagnetic waves?
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the motion of electrically charged particles |
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4.
What are the components of the electromagnetic spectrum?
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radio waves/ infrared waves/ visible light/ ultraviolet waves/ x-rays/ gamma rays |
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5.
Which component(s) of the electromagnetic spectrum can be seen by the human eye?
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visible light |
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6.
With what is each wavelength of visible light associated?
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a particular color |
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7.
What is created when all of the colors that are found in visible light combine?
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white light |
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8.
What is "color"?
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Color is the light that's reflected back to our eyes by objects. |
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9.
Objects have no color of their own. True or false?
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true |
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10.
What colors are found in visible light?
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red/ orange/ yellow/ green/ blue/ indigo/ violet |
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11.
What acronym can help us to remember the colors that are present in visible light?
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ROY G. BIV |
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12.
What are the four properties of light?
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reflection/ diffraction/ interference/ refraction |
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13.
_______________________________ occurs when light strikes an object's surface and bounces off that surface.
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Reflection |
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14.
The "angle of incidence" is equal to the "_________________________________________."
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angle of reflection |
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15.
______________________________ occurs when light waves bend around the edges of objects.
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Diffraction |
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16.
When two or more waves are in the same space at the same time, _____________________ occurs.
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interference |
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17.
When a light wave bends as it moves from one medium to another, ___________________ occurs.
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refraction |
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18.
A three-sided transparent lens that refracts white light is a(n) ________________________.
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prism |
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19.
Rainbows are created when __________________________________________________.
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raindrops in the air refract the colors of visible light |
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20.
Transparent materials ________________________________ light.
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transmit |
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21.
Translucent materials allow no light to pass through them. True or false?
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false |
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22.
__________________________________ materials absorb or reflect all light.
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opaque |
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23.
Objects ________________________ some colors of the spectrum and absorb others.
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reflect |
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24.
White objects __________________________________ all colors.
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reflect |
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25.
Black objects _________________________________ all colors
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absorb |
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26.
Why is the sky blue?
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Gas particles in the Earth's atmosphere cause violet and blue wavelengths of light to be reflected. |
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27.
How many colors can the human eye perceive?
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more than a million |
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28.
What controls how much light enters your eye?
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the iris |
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29.
What two light-sensitive nerve cells are in the retina?
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rods and cones |
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30.
Cones in the eye respond to ___________________________.
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color |
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31.
Rods in the eye are sensitive to _________________________________.
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light |
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32.
What are the primary colors of light?
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red/ blue/ green |
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33.
When red light and green light are mixed, what color of light is produced?
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yellow light |
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34.
What are the primary colors of pigment?
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magenta/ yellow/ cyan |
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35.
Mixing primary colors of pigment results in ______________________________________.
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color subtraction |
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36.
Fluorescent light is "full spectrum " light. True or false?
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false |
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37.
The filament of an incandescent light bulb is usually made of _________________________.
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tungsten |
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38.
Fluorescent light bulbs are filled with _________________________.
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gas (argon) |
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39.
"Laser" stands for "_________________________________________________________."
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light amplification by stimulated emission of radiation |
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40.
What are some fields in which lasers are used?
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medicine/ business/ entertainment |
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© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.
|