Term
| Electromagnetic Radiation (Spectrum) CHP3.1 |
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Definition
energy transmitted through space as varying electric and magnetic fields
LONGEST TO SHORTEST
R-I-V-UV-X-G
Radio-Infared-Visible-Ultraviolet-Xray-Gamma Ray
NOT BETA OR ALPHA WAVES |
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Definition
| transmits energy without the physical transport of material |
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Term
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Definition
| The maximum deviation of a wave above or below zero point |
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Term
| Frequency CHP3.1 (equation) |
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Definition
The number of wave crests passing any given point in a unit time
Frequency = 1/Period |
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Term
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Definition
| The time needed for an orbiting body to complete one revolution about another body |
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Definition
| The distance from one wave crest to another |
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Term
| Examples of Electromagnetic Radiation CHP3.1 |
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Definition
| Light, Radio Waves, X rays, IR |
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Term
| Longitudinal Waves CHP3.1 |
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Definition
| Displacement is parallel to the direction of wave < to > |
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Term
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Definition
| displacement is perpendicular to the direction of wave /\ and \/ |
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Term
| Velocity CHP3.1 (equation) |
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Definition
Speed at which crests move
VELOCITY= Wavelength/Period |
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Term
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Definition
ROYGBIV
Red Orange Yellow Green Blue Indigo Violet |
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Term
| Electromagnetic Waves CHP3.2 |
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Definition
Oscillating electric and
magnetic fields. Changing electric field creates magnetic field, and vice versa
NO upper limit on wavelength |
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Term
| Blackbody Spectrum definition CHP3.4 |
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Definition
the electromagnetic spectrum produced by a hypothetical object which can absorb 100% of incident light. The spectrum obeys a particular equation which depends only on the temperature.
Light depends on temp (red = hot, VERY RED= very hot... not hot = no color, but warm to the touch)
Peak goes to smaller wavelengths as temp increases
Flux goes up with temperature |
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Term
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Definition
| Transmits energy without the physical transport of material |
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Term
| RADIATION LAWS CHP3.3/3.4 |
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Definition
1. Peak wavelength is inversely proportional to temperature
2.Total energy emitted is proportional to fourth power of temperature (note intensity of curves) |
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Term
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Definition
Wavelength of peak emission (IS PROPORTIONAL TO) = 1/Temperature
blue = hottest ROYGBIV |
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Term
| Blackbody Spectrum graph CHP3.4 |
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Definition
up and down = Intensity
left to right = Wavelength
peak at mid
wavelength = smaller as temp increases |
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Term
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Definition
Flux (intensity) = Temperature/\4th power
dependence on total light energy (flux) leaving a blackbody on temp. |
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Term
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Definition
If one is moving toward a source of radiation, the wavelengths seem shorter; if moving away, they
seem longer
redshift- looks red and is long
blue shift- looks blue and short |
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Term
| 3 behaviors of light CHP3 |
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Definition
refraction- bending of light
defraction- scattering of light
polarization- alignment electric feilds |
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