Algerbra in Astrophysics

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Main Question or Discussion Point

I am realy quite terrible at rearranging equations, I wonder if anyone could help?

How can I rearrange : m-M=5log10(d/10) to give d=?

Thanks for any imput.
 

Answers and Replies

  • #2
Cyosis
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First divide by 5, [itex](m-M)/5=\log_{10}(d/10)[/itex]. To get get rid of the log_10 you take 10^ on both sides.

[tex]
10^{\frac{m-M}{5}}=\frac{d}{10}
[/tex]

Now multiply by 10.
 
  • #3
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Cheers!:smile: This helps alot!
 
  • #4
what is this simple calculation has to do with "Astrophysics" ...???
 
  • #5
what is this simple calculation has to do with "Astrophysics" ...???
This is the calculation for magnitudes. It's the bane of all new undergraduate astrophysics students :tongue:
 
  • #6
Wallace
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Stupid backwards magnitudes! I've seen even seasoned astronomers get in a verbal tangle using the wrong adjective to describe some magnitude (i.e. 'as high as' instead of 'as low as' or vice versa). No wonder beginners have trouble...
 
  • #7
Chronos
Science Advisor
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Magnitude is a pretty obscure and confusing measure of brightness. Think 2 to the fifth power.
 

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