Is it possible for a given lens to act as converging lens

[olyviab]

Question:
Is it possible for a given lens to act as converging lens in one medium and a diverging lens in another?



What i was thinking:
Yes. Let say we put the lens underwater. It slows the light down and turns the image upside down as it passes through the converging lens, turning it into a diverging lens.

Is this right?

 

[Matterwave]

Well, with lenses all there is to it is Snell's law right?

 

[rl.bhat]

Yes. If the refractive index of the converging lens is smaller than the surrounding medium, it may act as a diverging lens.

 

[Matterwave]

I think you should have let him figure that out himself...