Question

Thomas Wedgwood invented a process using silver nitrate to "write with light." This process was an important aspect in the invention of photography. But one problem with Wedgewood's early experiments was that the image was not ________________.

light sensitive

portable

permenant

in focus

Answer 1

I believe it’s 3. in focus, don’t get me wrong, but it seems more like it makes sense. hope it helps!... :)