How is the luminosity of the sun determined?

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Answer 1 · 2015-10-23T12:24:16

# L # = #3.79# x #10^26 #Watts

The Formula for Flux of an Object received at Earth is:

# F = L / (4.pi.D^2) #

Where,

F is the Flux
L is the Luminosity of the Object
D is the Distance to that object

Rearrange the Formula to get the Luminosity

# L = F.4.pi.D^2 #

Flux Received from the Sun is 1343 # W/ m^2 #
D is the Distance = 1 AU or 150 Million Kms = # 150 # x # 10^6 #

# L = 1343 . 4 . 3.142 . (1.5 x 10^11)^2 #
# L # = #3.79# x #10^26 #Watts