Two thin convex lenses are joined together to form a single combined lens. The focal length of one of them is 0.154 cm . If the focal length of the combined lens is 0.070 m , find the focal length of the other lenses ?

Question

anonymous · Answer

@chmvijay

chmvijay · Answer

1/f =1/f1 +1/f2 
find f2

anonymous · Answer

the focal length of single lens is in centimeter and the combined one is in meters......what do u prefer? which one should i convert ?

chmvijay · Answer

humn better convert cm to m 
or 
meter to cm
anything is ok 
but while calculating both should be in only one unit

chmvijay · Answer

LOL did you do that wt are u thinking :)

anonymous · Answer

i solved it the f2= 0.1283 m

anonymous · Answer

the focal length of f1 was in metre .... i mistyped it LOL

anonymous · Answer

help needed here = http://openstudy.com/study#/updates/518d0a94e4b062a8d1d9f0f9