Astronomy: A Beginners Guide to the Universe - Chapter 2
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12 Terms
Electromagnetic radiation
Travels through space in form of waves
Electromagnetic waves
Disturbance that transfers energy from one place to another. Produced by accelerating charged particles . Propagation of oscillation of couples electric and magnetic fields
Wave period
Number of seconds needed for wave to repeat itself
Wavelength
Number of meters needed for wave to repeat itself
Amplitude
Maximum departure from undisturbed space
Frequency
Number of wave crests passing any given unit of time
What's the wavelength of the visible spectrum?
Between 4x10^-7m and 7x10^-7m
Relationship between colour and frequency
Colour determined by frequency
Relationship between temperature, particle vibrations, and energy radiated
Temperature <-> particle vibration <-> energy radiated
Intensity
Strength or amount of radiation
Blackbody Curve
Represents spread of intensity of electromagnetic radiation emitted across electromagnetic spectrum [depends only on temperature of object]
Effect of temperature on blackbody curve
Curve shifts towards higher frequencies (shorter wavelengths) and greater intensities as temperature increases [SHAPE OF CURVE REMAINS THE SAME]
Note 
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