Star Luminosity # 2

Level 2

A star appears to be 10 10 times more luminous than the sun from earth , it is 860 860 light years or 5 ⋅ 1 0 15 m e t e r s 5 \cdot 10^{15} meters , and the distance from earth to sun is 1.5 ⋅ 1 0 11 1.5 \cdot 10^{11} away from the earth. What is the true luminosity of star in terms of the sun ?

100 , 200 100,200 600 , 000 600,000 200 , 000 200,000 300 , 000 300,000 500 , 000 500,000 100 , 000 100,000

Arjun Shrivastava by Arjun SHRIVASTAVA , 16, USA

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