What does this mean about H-R diagram?

  • Thread starter Thread starter miyu.chan
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miyu.chan

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i have this astro assignment where there's this requirement:
"in order to verify your answer, you may find it useful to know that a factor two in brightness equals 0.75 units along the vertical axis."
this is referring to the H-R diagram.

could you please translate that info to english? XD

thanks!!
 
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