we combine a convex lens of focal length f1 and concave lens of focal length f2 and their combined focal - Physics - Ray Optics And Optical Instruments

Question

we combine a convex lens of focal length f1 and
concave lens of focal length f2 and their combined focal
length was F the combination of these lenses will behave like a
aconcave lens if:

f1>f2
f1<f2
f 1
=f2
f1 less than or equal to f2
none of these

Kranav Sharma · Accepted Answer

Hello!
The lens in this case would be a Compound Lens which neither
behaves like a Convex or a Concave Lens It is normally used a
corrector for rectifying lens aberration etc

we combine a convex lens of focal length f1 and concave lens of focal length f2 and their combined focal length was F. the combination of these lenses will behave like a aconcave lens if: f1>f2 f1<f2 f 1 =f2 f1 less than or equal to f2 none of these

we combine a convex lens of focal length f₁ and concave lens of focal length f₂ and their combined focal length was F. the combination of these lenses will behave like a aconcave lens if:

f₁>f₂

f₁<f₂

f₁=f₂

f₁ less than or equal to f₂

none of these