Question

a 5.5 D lens is placed 14cm from an object 4mm in height. what are the position, type height of the image?

lens eq: 1/Do + 1/Di = 1/f

Answer 1

Do = .14m
Ho=.004m
Di = ?
f=?

Answer 2

if f = -.18m how do I work this out in the lens eq?

Answer 3

I have the correct answer, but I am missing something in the algebra i think because I can't get it.. Di = -.076m

Answer 4

Sorry , what does D stands for (5.5 D ) ? and its unit ?

Answer 5

thats the focal length

Answer 6

@mos1635

Answer 7

sorry, no good in lences