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20 Cards in this Set
- Front
- Back
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Electromagnetic Spectrum
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The entire range of electromagnetic radiation - all of its wavelengths, including those of visible light.
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Electromagnetic Radiation
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Traverse waves that transfer energy by radiation; vary in length from very long radio waves to extremely short gamma waves.
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Radiation (radiant energy)
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The transfer of energy in the form of waves. Radiation is a type of energy transfer that does not require matter.
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Magnetic Field
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Region around a magnet where magnetic forces act.
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Electric Field
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An area surrounding an electron that exerts a force on anything nearby with an electric charge; the strongest nearest the electron and weakens with distance.
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The Speed of Light
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The distance light can travel in a unit of time through a given substance. Light travels through a vacuum at 3*10^8 m/s.
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Radio Waves
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Electromagnetic waves that have long wavelengths (low frequencies); radio waves are used in communications.
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Microwaves
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Radio waves with the highest frequency and energy; used in communications and microwave ovens.
Problems: May be linked to some kinds of cancer. Frequencies around 2.45GHz (Microwave oven) can burn tissues |
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Radar
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Electromagnetic waves that have a wavelength slightly longer than visible light; indicates the presence of heat.
Problems: Can burn tissue |
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Visible Light
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Electromagnetic waves that have a wavelength slightly longer than visible light; indicates the presence of heat.
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Visible Radiation
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Electromagnetic waves that have a higher frequency than visible light; abbreviated UV.
Problems: Sunburns, mutations, skin cancer |
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Ultraviolet Radiation
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Electromagnetic waves having a wavelength shorter (higher frequency) than ultraviolet radiation; often used in medicine because it can penetrate tissue.
Problems: Mutations and cancer |
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X-rays
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High-frequency electromagnetic waves that travel at the speed of light, have no mass or charge, and are the most penetrating form of radiation.
Problems: Can cause mutations, cancer, radiation sickness and death (You probably won't turn into The Hulk) |
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Electric fields, Magnetic fields and Electromagnetic waves
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Moving electric fields produce magnetic fields which then produces electric fields and so on and so on.......
This is called an electromagnetic wave |
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Production of EMRs
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EMRs are produced by accelerating charged particles
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Red Spectrum
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Wavelength: 650-750nm
Frequency: 484-508THz Photon energy: 1.65-2.00 |
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Orange Spectrum
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Wavelength: 590-620nm
Frequency: 484-508THz Photon energy: 2.00-2.10 |
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Yellow Spectrum
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Wavelength: 570-590nm
Frequency: 508-526THz Photon energy: 2.10-2.17 |
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Green Spectrum
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Wavelength: 495-570nm
Frequency: 526-606THz Photon energy: 2.17-2.50 |
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Blue Spectrum
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Wavelength: 450-495nm
Frequency: 606-668THz Photon energy: 2.5-2.75 |
