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A star has a luminosity that is known to be 4.8 × 10²⁹ W. A scientist observing this star finds that the radiant flux intensity of light received on Earth from the star is 2.6 nW m⁻².
Determine the distance of the star from Earth.
9702/04/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 4 · Question 12(a)(ii)
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Suggested time: 3 min