Question 198: Ray Optics

Question

For a concave lens of focal length f, the relation
between object and image distances u and v,
respectively, from its pole can best be
represented by (u = v is the reference line) :

Accepted Answer

$$v = {{uf} \over {u + f}}$$
Case-I
If v = u
$$ \Rightarrow $$ f + u = f
$$ \Rightarrow $$ u = 0
Case-II
If u = $$\infty $$
then v = f
So you can see both of them are equal only when v = 0 and u = 0.

Answer

Answer

Answer

Answer

Ray Optics

For a concave lens of focal length f, the relation between object and image distances u and v, respectively, from its pole can best be represented by (u = v is the reference line) :

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