Astronomy Polytrope definition question!

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Homework Statement



Define what is mean by polytrope and polystopic index n. (This is work 2 marks)


The Attempt at a Solution



A polytrope is a solution for denstity for the polytropic equation of state.


Polytropic index is defines as: y = 1 1/n


So do you think I have defined them properly? How would you do it. I only ask because this seems to come up alot and I would rather get these somewhat easy two marks.
 

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