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igcse physics notesprinted 124 · PDF 124
124 pagesrevision 46936
printed 124 · PDF 124
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Certain types have the same peak level of brightness (absolute magnitude), making
them extremely useful in measuring the distance to remote stars and galaxies Type 1a
supernovae are so bright that they can be seen clearly even though they may be deep
inside their parent galaxy This allows the distance to the galaxy to be calculated