Lens and images lU`t~|>r+  
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Introduction: Along with mirrors, lens complete the set of simple optical elements. Lens +9M";'\c  
have been used for hundreds of years. Galileo constructed the first telescope from a pair of lens .f|)od[  
in 1609 and used it to discover, among other things, several of Jupiter’s moons. A lens forms KK4rVb:-  
images by bending the incoming light as it passes. Image formation can be understood by \)W Z D  
treating the incoming light as rays and using a simple geometric arguments. Like much of basic $<L@B|}F)  
physics, this approach isn’t completely correct but is a good approximation. Because of the 0Y8Cz