Answer:
A light-year is a unit of distance.
Explanation:
Light moves at a velocity of about 300,000 kilometers (km) each second. So in one year, it can travel about 10 trillion km. More precisely, one light-year is equal to 9,500,000,000,000 kilometers.
The average temperature of Earth given the solar irradiance is 238.4K.
<h3>How to calculate the temperature?</h3>
The following can be deduced from the information:
Let Earth's albedo =α =0.33
Radius of sun ( Rs) =6.955×10⁵
Value of Boltzmann constant= 5.67×10-⁸
L= 1350
T = average temperature
L= 4σ (Te)⁴ / (1-α)
1 - 0.33 = 4 × 5.67×10-⁸×(T)⁴ / 1350
0.67 × 1350 = 0.0000002268*(T)⁴
(T)⁴ = 3230357142.9
T = 238.4 k
In conclusion, the temperature is 238.4K.
<u>Complete question:</u>
Calculate the average temperature of Earth where the solar irradiance (L) is 1350W/m² and the albedo of Earth is 0.33. Consider Earth to be a perfect black body and the Stefan - Bollzmann constant to be 5.67 × 10^-8 W.
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B shows the victoria lake.
