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Unformatted text preview: âŽ¦ âŽ¤ âŽ¢ âŽ£ âŽ¡ âˆ’ + âˆ’ âˆ’ = 2 1 2 1 1 1 1 1 1 R R n d n R R n f L L L , where f is the effective focal length, n L is the refractive index of lens material, d is the thickness of lens. (b) the effective focal length of a two thin lens system is 2 1 2 1 1 1 1 f f d f f f âˆ’ + = , where f 1 and f 2 are focal lengths of two thin lens, respectively. d is the separation distance between two lenses....
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 Spring '11
 Prof.ShenghuiSong

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