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Paper 4Theory (Extended)1 marks
Astronomers observe a supernova in a distant galaxy.
Description
Supernova Observation
A supernova is observed with an apparent brightness of 1.0 x 10^-9 W/m^2. The absolute brightness of this type of supernova is known to be 1.0 x 10^-6 W/m^2.
- a[1]
State the formula used to calculate the distance to the galaxy.
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