Ray diagram for two lenses kept at some distanœe given in the diagram, which of the following option is correct (f1, f2=. focal length, d= distance between lenses)

Question

Ray diagram for two lenses kept at some distanœe given in the diagram, which of the following option is correct (f1, f2=. focal length, d= distance between lenses) (A) f1+f2>d (B) f1+f2 < d (C) f1+f2=d (D) Combination behaves like converging lens

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/cfb31f9fba7ebc5292674c2ad738f7c9-.png" /> For parallel incidence image is at f1 distance from O 1. For final emergence to be parallel object for II is at distance f2 from O2. The distance between I and II would be f1+f2

Q. Ray diagram for two lenses kept at some distanœe given in the diagram, which of the following option is correct $(f_{1}, f_{2} =$ focal length, $d =$ distance between lenses)

$f_{1} + f_{2} > d$

$f_{1} + f_{2} < d$

$f_{1} + f_{2} = d$

Combination behaves like converging lens

For parallel incidence image is at $f_{1}$ distance from $O_{1}$ .
For final emergence to be parallel object for $II$ is at distance $f_{2}$ from $O_{2}$ .
The distance between $I$ and $II$ would be $f_{1} + f_{2}$

Q. Ray diagram for two lenses kept at some distanœe given in the diagram, which of the following option is correct (f1​,f2​= focal length, d= distance between lenses)

f1​+f2​>d

f1​+f2​<d

f1​+f2​=d