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In: Physics

Use the inverse square law to estimate how the brightness of the Sun would change if...

Use the inverse square law to estimate how the brightness of the Sun would change if you moved from Earth at 1 AU to Saturn's location at 10 AU (i.e., give a fraction or percentage, not magnitude). Then, the brightest known star is R136a1 with an absolute magnitude of -12.5, explain why you cannot make a precise determination of its brightness as seen from Earth without more information

Solutions

Expert Solution

Inverse square law: Brightness of a star is inversely proportional to square of the distance.

Distance of Sun from Earth

Distance of Sun from Saturn

Brightness of sun from earth is , brightness of sun from Saturn is

The brightness of Sun from Saturn appears to be ( ) times that of brightness of Sun from Earth.

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Absolute magnitude of R136a1 is

Luminosity of sun is

Luminosity of star is can be calculated using above values.

Brightness of star is

The distance of star from Earth is needed to determine precisely the brightness of star.

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genius_generous answered 1 year ago

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