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The apparent brightness of a star is 1.0 ˛ 10-12 W/m2 and the peak wavelength is 600 nm. Estimate its distance from us.

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Einstein's principle of equivalence:  No experiment can be performed that could distinguish between a uniform gravitational field and an equivalent uniform acceleration. or Gravitational mass is equivalent to inertial mass.


The apparent brightness of a star is 1.0 ˛ 10-12 W/m<sup>2</sup> and the peak wavelength is 600 nm. Estimate its distance from us.






 
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