Convering lens made of ice

[tangur]

Would it be possible to start a fire by shaping a piece of ice ? That's the question.

I'm thinking that yes it would be possible if you shaped the ice in the form of a converging lens. Even though the lens is made of ice, the sun rays would not burn through it since the rays would converge on a point behind the lens and not in the lens itself.

I just want to know if my reasoning holds correct. Thanks

[Tide]

The ability of a lens to focus light is basic optics. There's no reason why it wouldn't be possible with an ice lens.