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slide 3 - Coggle Diagram
slide 3
light
The EM Spectrum
metric prefix scale
p、n、μ、m、k、M、G、T
Wavelength and Frequency
λv=c
1A=0.nm
The wave-particle duality of light
Energy in a photon
E=hv
1 keV ~ 1 Å
magnitude
m=-2.5logF+C
Absolute magnitude
m-M=5lgD-5
distance modulus
Visual and bolometric magnitude
Apparent distance modulus
Surface brightness
μ=m+2.5logθ
color
Color index
B-V
Color-Magnitude Diagram
Photometric Filters
Flux and spectral flux density
The cgs unit
F=E/dAdt
Spectral Energy Distribution (SED)
Blackbody radiation
Wien’s and Rayleigh-Jeans approximation
Spectrum
The HR Diagram
Spectral Type
atmospheric effect
Atmospheric Extinction
color dependent
Airmass
Less than 2
airmass=secz
Other
Refraction
Scintillation
dispersion
Seeing
skillsets for observation
Diurnal Observability of Objects
Seasonal Observability of Objects