Optics Equation

  • Thread starter Prologue
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  • #1
185
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I keep seeing this equation pop up and I have no idea what it is or where it comes from.

[tex]n_{1}f_{1}= -n_{2}f_{2}[/tex]

It looks like a take on snell's law, but what assumptions have to be made to get to this equation from snell's?
 
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Answers and Replies

  • #2
4,662
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The formula is related to an optical aberration called field curvature. See attachment.
 

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  • #3
185
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Thank you.
 

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