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Electromagnetic Radiation by Mind Map: Electromagnetic Radiation
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Electromagnetic Radiation

Common Characteristics

Travels at speed of light

The higher the frequency, the more likely the radiation is ionizing

Differences in wavelength results in different colors

Energy carried is dependent upon frequency and amplitude

Propagation may occur both in vacuum and material

Spectrum

380-435 nm - Violet 436-500 nm - Blue 501-520 nm - Cyan 521-565 nm - Green 566-590 nm - Yellow 591-625 nm - Orange 626-740 nm - Red

Anything with higher frequency will be ionizing

Ex: mutations due to damage to DNA

Anything at the visible spectrum or below is safe

Ex: Infrared, Radio waves, etc.

Secondary colors may be created by overlapping primary color EMR

Alternative approach is to use subtractive model by mixing red, yellow, blue, or magenta, yellow, and cyan to create necessary colors

NOT SURE ABOUT: Physical vs. Physiological light

Attributes

Reflection

When a ray strikes a surface, it will partially reflect at an equal but opposing angle

Refraction

When a way enters a surface / material, it may bend and change its velocity

Dispersion

When light passes through a material, the wave's different frequencies will travel at different velocity while in that material (according to their frequencies)

Diffraction

Bending or spreading out of waves around small objects or openings

Interference

Two waves positioned into a new wave frequency

Polarization

Helps determine the orientation of wave oscillations

Absorption

EMR may be absorbed by a material that it enters

Scattering

The trajectory of EMR may be deviated from a simple straight line

Transparency

Transparent materials can be passed through with EMR freely

Translucency allows light to pass diffusively

The opposite of translucency is opacity

Fluorescence

Property that allows a material to emit a different wave EMR after absorbing another frequency wave

Phosphorescence

Unlike fluorescence, phosphorescence does re-emit waves immediately, it may do so at much slower rate of a lower frequency EMR

Works Cited

http://hyperphysics.phy-astr.gsu.edu/hbase/ligcon.html#c1

http://en.wikipedia.org

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