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Explain the concepts of “luminosity distance” and “proper distance”, and how they are different. How does...

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Physics

Explain the concepts of “luminosity distance” and “properdistance”, and how they are different. How does the observedbolometric flux, f, from a distant source with luminosity,L, depend on redshift, z? What factor(s) cause(s)this redshift dependence? Describe the properties of a universewhere the luminosity distance would be identical to the properdistance.

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The proper distance corresponds to distance where a distantobject would be at a specific moment of cosmological time whichcan change over time due to the expansion of the    See Answer
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