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-   -   Concave spherical mirror in a car headlamp (http://physicshelpforum.com/light-optics/5507-concave-spherical-mirror-car-headlamp.html)

Tesoro72 Feb 14th 2011 11:14 AM

Concave spherical mirror in a car headlamp
 
I'm given only the object distance from the mirror. How would I find the focal length?

topsquark Feb 14th 2011 12:12 PM

Quote:

Originally Posted by Tesoro72 (Post 16211)
I'm given only the object distance from the mirror. How would I find the focal length?

Have you tried looking this up on your text? Or on-line? There is a simple formula based on the radius of the mirror.

-Dan

Tesoro72 Feb 17th 2011 01:52 PM

I couldn't find a simple equation in the book, but my teacher reviewed the assignment

topsquark Feb 17th 2011 02:29 PM

Quote:

Originally Posted by Tesoro72 (Post 16298)
I couldn't find a simple equation in the book, but my teacher reviewed the assignment

For the record f = -R/2 where R is the radius of the mirror.

-Dan


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