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26 Cards in this Set
- Front
- Back
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What are transverse waves that have some electrical properties with some magnetic properties?
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ELECTROGANMETIC WAVES
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Do electromag. waves require a medium through which to travel?
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NO
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How do electrogmagnetic waves travel?
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As VIBRATIONS in electric and magnetic fields
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What is the energy transferred by electromag. waves called
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ELECTROMAG. RADIATION
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How fast can electromag. waves go ?
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300,000,000 meters per second-speed of light.
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If the wave length is shorter the frquency is ____?
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HIGHER
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Light has properties of both_____ and _____.
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particles and waves
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Polarized light is light that ___?
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passes through a polarized FILTER
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Photoelectric effect is movement of particles called______.
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ELECTRONS
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PACKETS OR PARTICLES OF ENERGY IS ?
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photons
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All electromag. waves travel at the ____ speed, but they have ____ wavelengths and frequencies
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SAME
DIFFERENT |
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SPEED = what?
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Wavelength x Frequency
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The name of the range of electromag. waves 3hn they are place in order of increasing frequency is _______ ______.
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ELECTROMAG. SPECTRUM
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Radio waves have the _____ wavelength and the _____ frequency.
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longest
lowest |
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Microwaves have the ____ waves and the ____ frequency.
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shortest
highest |
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Radar is called also ___ ___ ___ ___.
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Radio Dection And Ranging
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What kind of waves are sent out and reflected back by objects they strike?
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RADAR
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What is an MRI? and what does it do?
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Magnectic Resonance Imaging are radio waves and strong magnetic fields that cause atoms in the body to line up in the same direction . They return to their original direction an create a picture
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Which kind of waves are shorter wavelengths and higher frequences but it is felt as heat?
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Infrared rays
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What does infra mean?
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below-so it is below red
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A thermogram shows what/
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Different temperatures in different colors.
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Visible light has ____ wavelengths and ____ frequences than an infrared wave
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shorter
higher |
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Which rays have wavelengths SHORTER than that of visible light.
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ULTRAVIOLET RAYS
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UV Ultra is Latin for what?
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Latin for BEYOND. so it means beyond violet.
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___ doses are beneficial of ultrviolet to kill ____but ___ doses can cause _____.
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SMALL
MICROORGANISMS LARGE |
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Name three things about XRAYS?
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1) VERY SHORT wavelengths.
2) because of high frequency they carry more energy and can penetrate most matter 3) Too much exposer can cause cancer. |
