Please enable JavaScript.
Coggle requires JavaScript to display documents.
Light - Coggle Diagram
Light
EM Spectrum
from radio to gamma ray
metric prefix scale
Special units for wavelength
1 β«=0.1 ππ
convert between wavelength and frequency
ππ=π
wave-particle duality
Energy in a photon
Special units for energy or frequency
1 eV = 1.602x10^-19 J
Quantifying light
magnitude
Pogson equation
m2-m1=-2.5log(F2/F1)
Flux ratio = 100
Ξπ=5
Visual and bolometric magnitude
Absolute magnitude & Distance modulus
m-M=5logd-5
Surface brightness
Color index
Color-Magnitude Diagram
flux
spectral flux density
the cgs unit
SED
Blackbody radiation / Specific Intensity
Wienβs
displacement law
Wienβs and Rayleigh-Jeans approximation
Luminosity of a blackbody & Effective temperature
Invariance of surface intensity
Atmosphere and ISM
Atmospheric Extinction
Airmass
color dependent
Other atmospheric effect
Refraction
Scintillation (why star twinkle)
Dispersion (differential refraction)
Seeing
ISM extinction
Reddening
πΈ(π΅βπ)=(π΅βπ)β(π΅βπ)_0
Extinction law
π΄_π=πΆβ πΈ(π΅βπ)
Details of light
Spectrum
The HR Diagram &
Spectral Sequence
spectral types of stars