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40 Cards in this Set
- Front
- Back
what causes a rainbow to be visible? |
when raindrops in the sky and light from the sun enters raindrops at a certain angle |
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What are the colors of the rainbow in order |
red, orange, yellow, green, blue, indigo, violet |
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what is the electromagnetic spectrum in order? |
Gamma, xray, ultraviolet radiation, visible light infrared, microwaves, radio waves, FM, AM |
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electromagnetic waves |
a wave that can travel through matter or space |
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gamma rays |
the highest-energy electromagnetic waves with the shortest wavelengths and highest frequencies |
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Gamma rays are found ____ |
1. nuclear weapons 2. radioactive decay |
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gamma rays are used to: |
1. kill bacteria and insects in food industry 2. see inside large steel shipping containers |
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x-yrays |
penetrate through skin and muscle and make a shadow of denser tissues |
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x-rays are used to see |
1. bones 2. teeth |
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ultraviolet rays |
waves that are released by the sun |
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name the 3 types of UV radiation |
1. UVA 2. UVB 3. UVC |
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Some UV is good because it produces ____ |
Vitamin D, that strengthens bones |
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the ozone layer blocks which of the UV rays |
UVC |
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the ozone layer is made of |
oxygen (O3) |
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what are some things that are harmful to the ozone layer |
pollution, forest fire, and spray cans |
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visible light |
only electromagnetic wave that we can see, comes from the sun as white light |
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colors of the rainbow |
red, orange, yellow, green, blue, indigo, and violet |
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what is visible when white light bends |
the rainbow |
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in science what are not colors |
white and black |
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what makes objects black |
the object absorbs all of the light so no light is reflected |
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what makes objects white |
the object reflects all light |
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which wave of the rainbow has the longest wavelength |
red |
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which wave of the rainbow has the shortest wavelength |
violet |
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what are the 2 tools that bend white light |
1. prism 2. diffraction grating |
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how do we see color |
we see the color that is reflected rather than absorbed by the object |
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infrared waves |
electrons in atoms and molecules are vibrating to emit waves |
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when electrons vibrate what is produced |
heat |
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infrared waves show... |
body heat |
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microwaves |
used to cook and send cell phone |
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transverse waves |
waves that move up and down ex. water |
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compressional waves |
waves that move back and forth |
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rarefaction waves |
wave that are spread out after a compressional wave |
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crest |
top of the wave |
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trough |
bottom of the wave |
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wavelength |
from crest to crest |
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frequency |
how many crest pass a certain point in a given time |
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amplitude |
from the mid-line to crest |
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amplitude is defined as |
waves intensity |
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hertz |
measure of sound / cycles per second |
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dopplar effect |
change in sound as you move |